Failed to install Grub on IMac

Support
1

I am trying to install Manjaro on an old iMac there is no macOS on it and I want only manjaro on this pc but I always get this error:

Der Bootloader konte nicht installiert werden. Der Installationsbefehl

grub-install --target=x86_64-efi --efi-directory=/boot/efi-bootloader --id=Manjaro --force
erzeugte

Fehlercode 1

In englisch it means the bootloader couldn’t be installed and the command gave back the error code 1.

Hier der inxi befehl

‎System:
  Kernel: 6.5.1-1-MANJARO arch: x86_64 bits: 64 compiler: gcc v: 13.2.1
    clocksource: tsc available: hpet,acpi_pm
    parameters: BOOT_IMAGE=/boot/vmlinuz-x86_64 lang=en_US keytable=us tz=UTC
    misobasedir=manjaro misolabel=MANJARO_GNOMEM_2301 quiet
    systemd.show_status=1 splash driver=free nouveau.modeset=1 i915.modeset=1
    radeon.modeset=1
  Desktop: GNOME v: 44.4 tk: GTK v: 3.24.38 wm: gnome-shell dm: GDM v: 44.1
    Distro: Manjaro Linux base: Arch Linux
Machine:
  Type: Laptop System: Apple product: MacBookAir5,2 v: 1.0 serial: <filter>
    Chassis: type: 10 v: Mac-2E6FAB96566FE58C serial: <filter>
  Mobo: Apple model: Mac-2E6FAB96566FE58C v: MacBookAir5,2 serial: <filter>
    UEFI: Apple v: 429.0.0.0.0 date: 03/18/2022
Battery:
  ID-1: BAT0 charge: 3.7 Wh (6.6%) condition: 56.4/60.8 Wh (92.8%) volts: 7.4
    min: 7.6 model: LMP A1405 type: Li-ion serial: N/A status: discharging
    cycles: 198
Memory:
  System RAM: total: 4 GiB available: 3.74 GiB used: 1.92 GiB (51.3%)
    igpu: 64 MiB
  Array-1: capacity: 8 GiB slots: 2 modules: 2 EC: None
    max-module-size: 4 GiB note: est.
  Device-1: DIMM0 type: DDR3 detail: synchronous size: 2 GiB speed: 1600 MT/s
    volts: N/A width: N/A manufacturer: 0x80AD
    part-no: 0x484D54333235533643465238412D50422020 serial: <filter>
  Device-2: DIMM0 type: DDR3 detail: synchronous size: 2 GiB speed: 1600 MT/s
    volts: N/A width: N/A manufacturer: 0x80AD
    part-no: 0x484D54333235533643465238412D50422020 serial: <filter>
CPU:
  Info: model: Intel Core i5-3427U socket: U2E1 bits: 64 type: MT MCP SMP
    arch: Ivy Bridge gen: core 3 level: v2 built: 2012-15 process: Intel 22nm
    family: 6 model-id: 0x3A (58) stepping: 9 microcode: 0x21
  Topology: cpus: 1x cores: 2 tpc: 2 threads: 4 smt: enabled cache:
    L1: 4x 128 KiB (512 KiB) desc: d-2x32 KiB; i-2x32 KiB L2: 4x 512 KiB (2 MiB)
    desc: 2x256 KiB L3: 4x 3 MiB (12 MiB) desc: 1x3 MiB
  Speed (MHz): avg: 800 min/max: 800/2800 base/boost: 1800/1800 scaling:
    driver: intel_cpufreq governor: schedutil volts: 0.8 V ext-clock: 25 MHz
    cores: 1: 800 2: 800 3: 800 4: 800 bogomips: 18366
  Flags: acpi aes aperfmperf apic arat arch_perfmon avx bts clflush cmov
    constant_tsc cpuid cpuid_fault cx16 cx8 de ds_cpl dtes64 dtherm dts ept
    erms est f16c flexpriority flush_l1d fpu fsgsbase fxsr ht ibpb ibrs ida
    lahf_lm lm mca mce md_clear mmx monitor msr mtrr nonstop_tsc nopl nx pae
    pat pbe pcid pclmulqdq pdcm pebs pge pln pni popcnt pse pse36 pti pts
    rdrand rdtscp rep_good sep smep smx ss ssbd sse sse2 sse4_1 sse4_2 ssse3
    stibp syscall tm tm2 tpr_shadow tsc tsc_deadline_timer vme vmx vnmi vpid
    x2apic xsave xsaveopt xtopology xtpr
  Vulnerabilities:
  Type: gather_data_sampling status: Not affected
  Type: itlb_multihit status: KVM: VMX disabled
  Type: l1tf mitigation: PTE Inversion; VMX: conditional cache flushes, SMT
    vulnerable
  Type: mds mitigation: Clear CPU buffers; SMT vulnerable
  Type: meltdown mitigation: PTI
  Type: mmio_stale_data status: Unknown: No mitigations
  Type: retbleed status: Not affected
  Type: spec_rstack_overflow status: Not affected
  Type: spec_store_bypass mitigation: Speculative Store Bypass disabled via
    prctl
  Type: spectre_v1 mitigation: usercopy/swapgs barriers and __user pointer
    sanitization
  Type: spectre_v2 mitigation: Retpolines, IBPB: conditional, IBRS_FW,
    STIBP: conditional, RSB filling, PBRSB-eIBRS: Not affected
  Type: srbds status: Vulnerable: No microcode
  Type: tsx_async_abort status: Not affected
Graphics:
  Device-1: Intel 3rd Gen Core processor Graphics vendor: Apple driver: i915
    v: kernel arch: Gen-7 process: Intel 22nm built: 2012-13 ports: active: eDP-1
    empty: DP-1, DP-2, HDMI-A-1, HDMI-A-2, VGA-1 bus-ID: 00:02.0
    chip-ID: 8086:0166 class-ID: 0300
  Device-2: Apple FaceTime HD Camera (Built-in) driver: uvcvideo type: USB
    rev: 2.0 speed: 480 Mb/s lanes: 1 mode: 2.0 bus-ID: 1-1.1:3
    chip-ID: 05ac:8510 class-ID: 0e02 serial: <filter>
  Display: server: X.org v: 1.21.1.8 with: Xwayland v: 23.2.0
    compositor: gnome-shell driver: gpu: i915 display-ID: :0 screens: 1
  Screen-1: 0 s-res: 1440x900 s-size: <missing: xdpyinfo>
  Monitor-1: eDP-1 model: Apple Color LCD built: 2011 res: 1440x900 hz: 60
    dpi: 126 gamma: 1.2 size: 290x180mm (11.42x7.09") diag: 341mm (13.4")
    ratio: 16:10, 15:9 modes: 1440x900
  API: OpenGL v: 4.2 Mesa 23.1.6-3 renderer: Mesa Intel HD Graphics 4000
    (IVB GT2) direct-render: Yes
Audio:
  Device-1: Intel 7 Series/C216 Family High Definition Audio
    driver: snd_hda_intel v: kernel bus-ID: 00:1b.0 chip-ID: 8086:1e20
    class-ID: 0403
  API: ALSA v: k6.5.1-1-MANJARO status: kernel-api tools: N/A
  Server-1: JACK v: 1.9.22 status: off tools: N/A
  Server-2: PipeWire v: 0.3.79 status: off tools: pw-cli
  Server-3: PulseAudio v: 16.1 status: active (root, process)
    with: pulseaudio-alsa type: plugin tools: pacat,pactl
Network:
  Device-1: Broadcom BCM43224 802.11a/b/g/n vendor: Apple AirPort Extreme
    driver: bcma-pci-bridge v: N/A modules: bcma pcie: gen: 1 speed: 2.5 GT/s
    lanes: 1 bus-ID: 02:00.0 chip-ID: 14e4:4353 class-ID: 0280
  IF-ID-1: wlp2s0b1 state: down mac: <filter>
  WAN IP: No WAN IP found. Connected to web? SSL issues? Try enabling dig
Bluetooth:
  Device-1: Apple Built-in Bluetooth 2.0+EDR HCI driver: btusb v: 0.8 type: USB
    rev: 2.0 speed: 12 Mb/s lanes: 1 mode: 1.1 bus-ID: 2-1.8.1.3:9
    chip-ID: 05ac:821f class-ID: fe01
  Report: rfkill ID: hci0 rfk-id: 0 state: up address: see --recommends
Logical:
  Message: No logical block device data found.
RAID:
  Message: No RAID data found.
Drives:
  Local Storage: total: 1.19 TiB used: 120.23 GiB (9.8%)
  ID-1: /dev/sda maj-min: 8:0 vendor: Apple model: SSD SM256E
    family: SD/SM/TS...E/F/G SSDs size: 233.76 GiB block-size: physical: 4096 B
    logical: 512 B sata: 3.0 speed: 6.0 Gb/s tech: SSD serial: <filter>
    fw-rev: 9A1Q temp: 45 C scheme: GPT
  SMART: yes state: enabled health: PASSED on: 23d 16h cycles: 16656
  ID-2: /dev/sdc maj-min: 8:32 vendor: SanDisk model: USB 3.2Gen1
    size: 57.3 GiB block-size: physical: 512 B logical: 512 B type: USB rev: 3.2
    spd: 5 Gb/s lanes: 1 mode: 3.2 gen-1x1 tech: N/A serial: <filter>
    fw-rev: 1.00 scheme: MBR
  SMART Message: Unknown USB bridge. Flash drive/Unsupported enclosure?
  ID-3: /dev/sdd maj-min: 8:48 vendor: Western Digital
    model: WD10SDRW-11A0XS1 size: 931.48 GiB block-size: physical: 4096 B
    logical: 512 B type: USB rev: 3.2 spd: 5 Gb/s lanes: 1 mode: 3.2 gen-1x1
    sata: 3.1 speed: 6.0 Gb/s tech: HDD rpm: 5400 serial: <filter> fw-rev: 4010
    drive-rev: 01.01A01 temp: 28 C scheme: GPT
  SMART: yes state: enabled health: PASSED on: 61 hrs cycles: 81
  Message: No optical or floppy data found.
Partition:
  ID-1: /run/media/manjaro/AMOGUS raw-size: 931.48 GiB
    size: 931.25 GiB (99.98%) used: 120.23 GiB (12.9%) fs: vfat block-size: 512 B
    dev: /dev/sdd1 maj-min: 8:49 label: AMOGUS uuid: 8633-110B
Swap:
  Alert: No swap data was found.
Unmounted:
  ID-1: /dev/sda1 maj-min: 8:1 size: 300 MiB fs: vfat label: N/A
    uuid: 127C-C554
  ID-2: /dev/sda2 maj-min: 8:2 size: 233.46 GiB fs: ext4 label: N/A
    uuid: 81a9b83b-7e7e-4e2e-b11d-9ca53ab15c4d
  ID-3: /dev/sdc1 maj-min: 8:33 size: 2.92 GiB fs: iso9660
  ID-4: /dev/sdc2 maj-min: 8:34 size: 4 MiB fs: vfat label: MISO_EFI
    uuid: F195-5B23
USB:
  Hub-1: 1-0:1 info: full speed or root hub ports: 2 rev: 2.0
    speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 chip-ID: 1d6b:0002
    class-ID: 0900
  Hub-2: 1-1:2 info: Intel Integrated Rate Matching Hub ports: 6 rev: 2.0
    speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 chip-ID: 8087:0024
    class-ID: 0900
  Device-1: 1-1.1:3 info: Apple FaceTime HD Camera (Built-in) type: video
    driver: uvcvideo interfaces: 3 rev: 2.0 speed: 480 Mb/s (57.2 MiB/s) lanes: 1
    mode: 2.0 power: 500mA chip-ID: 05ac:8510 class-ID: 0e02 serial: <filter>
  Hub-3: 2-0:1 info: full speed or root hub ports: 2 rev: 2.0
    speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 chip-ID: 1d6b:0002
    class-ID: 0900
  Hub-4: 2-1:2 info: Intel Integrated Rate Matching Hub ports: 8 rev: 2.0
    speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 chip-ID: 8087:0024
    class-ID: 0900
  Hub-5: 2-1.8:3 info: Microchip (formerly SMSC) 2.0 Hub ports: 3 rev: 2.0
    speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 power: 2mA chip-ID: 0424:2513
    class-ID: 0900
  Hub-6: 2-1.8.1:4 info: Broadcom BCM2046B1 USB 2.0 Hub (part of BCM2046
    Bluetooth) ports: 3 rev: 2.0 speed: 12 Mb/s (1.4 MiB/s) lanes: 1 mode: 1.1
    power: 94mA chip-ID: 0a5c:4500 class-ID: 0900
  Device-1: 2-1.8.1.3:9 info: Apple Built-in Bluetooth 2.0+EDR HCI
    type: bluetooth driver: btusb interfaces: 4 rev: 2.0
    speed: 12 Mb/s (1.4 MiB/s) lanes: 1 mode: 1.1 chip-ID: 05ac:821f
    class-ID: fe01
  Device-2: 2-1.8.2:5 info: Apple Internal Keyboard/Trackpad (MacBook Air)
    (ISO) type: keyboard,HID,mouse driver: apple,bcm5974,usbhid interfaces: 3
    rev: 2.0 speed: 12 Mb/s (1.4 MiB/s) lanes: 1 mode: 1.1 power: 40mA
    chip-ID: 05ac:024d class-ID: 0301
  Device-3: 2-1.8.3:6 info: Apple Internal Memory Card Reader
    type: mass storage driver: usb-storage interfaces: 1 rev: 2.0
    speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 power: 500mA
    chip-ID: 05ac:8404 class-ID: 0806 serial: <filter>
  Hub-7: 3-0:1 info: hi-speed hub with single TT ports: 4 rev: 2.0
    speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 chip-ID: 1d6b:0002
    class-ID: 0900
  Hub-8: 4-0:1 info: super-speed hub ports: 4 rev: 3.0
    speed: 5 Gb/s (596.0 MiB/s) lanes: 1 mode: 3.2 gen-1x1 chip-ID: 1d6b:0003
    class-ID: 0900
  Device-1: 4-1:2 info: SanDisk 3.2Gen1 type: mass storage
    driver: usb-storage interfaces: 1 rev: 3.2 speed: 5 Gb/s (596.0 MiB/s)
    lanes: 1 mode: 3.2 gen-1x1 power: 896mA chip-ID: 0781:55a3 class-ID: 0806
    serial: <filter>
  Device-2: 4-2:3 info: Western Digital My Passport 2627 type: mass storage
    driver: usb-storage interfaces: 1 rev: 3.2 speed: 5 Gb/s (596.0 MiB/s)
    lanes: 1 mode: 3.2 gen-1x1 power: 896mA chip-ID: 1058:2627 class-ID: 0806
    serial: <filter>
Sensors:
  System Temperatures: cpu: 62.0 C mobo: N/A
  Fan Speeds (rpm): N/A
Info:
  Processes: 218 Uptime: 2m wakeups: 2 Init: systemd v: 253 default: graphical
  tool: systemctl Compilers: gcc: 13.2.1 clang: 16.0.6 Packages: pm: pacman
  pkgs: 1003 libs: 289 tools: gnome-software,pamac Shell: Sudo (sudo)
  v: 1.9.14p3 default: Bash v: 5.1.16 running-in: gnome-terminal inxi: 3.3.29
2

Welcome to Manjaro! :smiling_face_with_three_hearts:

  1. Please read the information behind this link. It will help you to post necessary information.
  1. Please press the three dots … below your post and then press the :pencil2:
  • If you give us information about your system, we can see what we’re talking about and make better suggestions.
  • You can do this by using inxi in a terminal or in console.
sudo inxi --admin --verbosity=7 --filter --no-host --width
  • Personally identifiable information such as serial numbers and MAC addresses are filtered out by this command
  • Presenting the information in this way allows everyone to be familiar with the format and quickly find the items they need without missing anything.
  1. Copy the output from inxi (including the command) and paste it into your post.
  • To make it more readable, add 3 backticks ``` on an extra line before and after the pasted text.

Have you already :mag: for your problem in the forum ? (Wisdom lies in asking → listening → reading :wink: )

3

The efi directory must be in /boot/efi/

To know in which partition the efi is, we must examine the partition table, so if your main disk is /dev/sda then.

sudo fdisk -l /dev/sda
Device             Start        End   Sectors   Size Type
/dev/sda1           2048     309247    307200   150M EFI System
/dev/sda2         309248  964843519 964534272 459.9G Linux filesystem
/dev/sda3      964843520 1000214527  35371008  16.9G Linux filesystem

In the result search for something like EFI System or EFI (FAT-12/16/32)

Once you know the partition number then (in this case sda1), we must mount it in /boot/efi.
If for some reason the directory /boot/efi/ does not exist, create it:

mkdir /boot/efi

and mount the efi into that directory:

mount /dev/sda1 /boot/efi/

And I think that is all, you must be able to install grub in your disk.

Note that grub is case-sensitive while the EFI filesystem is case-preserving. If your boot directory is /boot/EFI, the UEFI firmware can find it, but grub can’t.

Also worth noting that you’ll end up with /boot/efi/EFI once everything is correctly set up

Cheers,
Eddy

4

hi there,
I think I have a quite similar problem.
As I try to freshly install Manjaro 23.0.2 on an iMac 27’’ (12,2, mid-2011) I also get a Bootloader installation error. In the Calamares-log I see grub-install: error: efibootmgr failed to register the boot entry: No such file or directory.

After this error, when I look at output of df I see also that Calamares still has mounted the boot/efi partition under /tmp/calamares-root-xyz. So, to me it looks as if the chroot hangs during install.

The final part of the Calamares log-file looks like this:

2023-10-04 - 00:18:04 [6]: virtual Calamares::JobResult Calamares::PythonJob::exec()
    Job file "/usr/lib/calamares/modules/displaymanager/main.py" 
2023-10-04 - 00:18:04 [6]: [PYTHON JOB]: Found gettext "en_US" in "/usr/share/locale/en_US" 
2023-10-04 - 00:18:04 [6]:     .. Job description from __doc__ "displaymanager" = "Configure display managers." 
2023-10-04 - 00:18:04 [6]: [PYTHON JOB]: "lightdm selected but not installed" 
2023-10-04 - 00:18:04 [6]: [PYTHON JOB]: "gdm selected but not installed" 
2023-10-04 - 00:18:04 [6]: [PYTHON JOB]: "mdm selected but not installed" 
2023-10-04 - 00:18:04 [6]: [PYTHON JOB]: "lxdm selected but not installed" 
2023-10-04 - 00:18:04 [6]: [PYTHON JOB]: "slim selected but not installed" 
2023-10-04 - 00:18:04 [6]: [PYTHON JOB]: "Using rootMountPoint '/tmp/calamares-root-pyz1y_5h'" 
2023-10-04 - 00:18:04 [6]: [PYTHON JOB]: ".. selected DE plasma" 
2023-10-04 - 00:18:04 [2]: boost::python::api::object CalamaresPython::GlobalStoragePythonWrapper::value(const std::string&) const
    WARNING: Unknown GS key autoLoginUser 
2023-10-04 - 00:18:04 [6]: [PYTHON JOB]: "Unsetting autologin." 
2023-10-04 - 00:18:04 [6]: virtual void Calamares::JobThread::run()
    Starting job "mhwdcfg" ( 30 / 36 ) 
2023-10-04 - 00:18:04 [6]: virtual Calamares::JobResult Calamares::PythonJob::exec()
    Job file "/usr/lib/calamares/modules/mhwdcfg/main.py" 
2023-10-04 - 00:18:04 [6]:     .. Job description from __doc__ "mhwdcfg" = "Configure the hardware" 
2023-10-04 - 00:18:04 [6]:     .. Running ("mhwd", "-a", "pci", "free", "0200", "--pmconfig", "/opt/mhwd/pacman-mhwd.conf") 
2023-10-04 - 00:18:05 [6]:     .. Running ("mhwd", "-a", "pci", "free", "0280", "--pmconfig", "/opt/mhwd/pacman-mhwd.conf") 
2023-10-04 - 00:18:06 [6]:     .. Running ("mhwd", "-a", "pci", "free", "0300", "--pmconfig", "/opt/mhwd/pacman-mhwd.conf") 
2023-10-04 - 00:18:10 [6]:     .. Running ("mhwd", "-a", "pci", "free", "0302", "--pmconfig", "/opt/mhwd/pacman-mhwd.conf") 
2023-10-04 - 00:18:11 [6]:     .. Running ("mhwd", "-a", "pci", "free", "0380", "--pmconfig", "/opt/mhwd/pacman-mhwd.conf") 
2023-10-04 - 00:18:12 [6]: virtual void Calamares::JobThread::run()
    Starting job "hwclock" ( 31 / 36 ) 
2023-10-04 - 00:18:12 [6]: virtual Calamares::JobResult Calamares::PythonJob::exec()
    Job file "/usr/lib/calamares/modules/hwclock/main.py" 
2023-10-04 - 00:18:12 [6]: [PYTHON JOB]: Found gettext "en_US" in "/usr/share/locale/en_US" 
2023-10-04 - 00:18:12 [6]:     .. Job description from pretty_name "hwclock" = "Setting hardware clock." 
2023-10-04 - 00:18:12 [6]:     .. Running ("hwclock", "--systohc", "--utc") 
2023-10-04 - 00:18:12 [6]: [PYTHON JOB]: "Hwclock set using RTC method." 
2023-10-04 - 00:18:12 [6]: virtual void Calamares::JobThread::run()
    Starting job "services" ( 32 / 36 ) 
2023-10-04 - 00:18:12 [6]: virtual Calamares::JobResult Calamares::PythonJob::exec()
    Job file "/usr/lib/calamares/modules/services/main.py" 
2023-10-04 - 00:18:12 [6]: [PYTHON JOB]: Found gettext "en_US" in "/usr/share/locale/en_US" 
2023-10-04 - 00:18:12 [6]:     .. Job description from pretty_name "services" = "Configure systemd services" 
2023-10-04 - 00:18:12 [6]:     .. Running ("systemctl", "enable", "bluetooth.service") 
2023-10-04 - 00:18:12 [6]:     .. Running ("systemctl", "enable", "cronie.service") 
2023-10-04 - 00:18:12 [6]:     .. Running ("systemctl", "enable", "ModemManager.service") 
2023-10-04 - 00:18:12 [6]:     .. Running ("systemctl", "enable", "NetworkManager.service") 
2023-10-04 - 00:18:12 [6]:     .. Running ("systemctl", "enable", "cups.service") 
2023-10-04 - 00:18:12 [6]:     .. Running ("systemctl", "enable", "haveged.service") 
2023-10-04 - 00:18:12 [6]:     .. Running ("systemctl", "enable", "sddm.service") 
2023-10-04 - 00:18:12 [6]:     .. Running ("systemctl", "enable", "graphical.target") 
2023-10-04 - 00:18:12 [6]:     .. Running ("systemctl", "enable", "fstrim.timer") 
2023-10-04 - 00:18:12 [6]:     .. Running ("systemctl", "enable", "pacman-filesdb-refresh.timer") 
2023-10-04 - 00:18:12 [6]:     .. Running ("systemctl", "disable", "pacman-init.service") 
2023-10-04 - 00:18:12 [6]:     .. Target cmd: ("systemctl", "disable", "pacman-init.service") Exit code: 1 output:
 Failed to disable unit, unit pacman-init.service does not exist.
2023-10-04 - 00:18:12 [2]: WARNING: [PYTHON JOB]: "Cannot disable systemd .service pacman-init" 
2023-10-04 - 00:18:12 [2]: WARNING: [PYTHON JOB]: "systemctl disable call in chroot returned error code 1" 
2023-10-04 - 00:18:12 [6]: virtual void Calamares::JobThread::run()
    Starting job "grubcfg" ( 33 / 36 ) 
2023-10-04 - 00:18:12 [6]: virtual Calamares::JobResult Calamares::PythonJob::exec()
    Job file "/usr/lib/calamares/modules/grubcfg/main.py" 
2023-10-04 - 00:18:12 [6]: [PYTHON JOB]: Found gettext "en_US" in "/usr/share/locale/en_US" 
2023-10-04 - 00:18:12 [6]:     .. Job description from pretty_name "grubcfg" = "Configure GRUB." 
2023-10-04 - 00:18:12 [6]:     .. Running ("sh", "-c", "which dracut") 
2023-10-04 - 00:18:12 [6]:     .. Target cmd: ("sh", "-c", "which dracut") Exit code: 1 output:
 which: no dracut in (/home/manjaro/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/bin:/usr/bin/site_perl:/usr/bin/vendor_perl:/usr/bin/core_perl)
2023-10-04 - 00:18:12 [6]:     .. Running ("sh", "-c", "which plymouth") 
2023-10-04 - 00:18:12 [6]: virtual void Calamares::JobThread::run()
    Starting job "bootloader" ( 34 / 36 ) 
2023-10-04 - 00:18:12 [6]: virtual Calamares::JobResult Calamares::PythonJob::exec()
    Job file "/usr/lib/calamares/modules/bootloader/main.py" 
2023-10-04 - 00:18:12 [6]: [PYTHON JOB]: Found gettext "en_US" in "/usr/share/locale/en_US" 
2023-10-04 - 00:18:12 [6]:     .. Job description from pretty_name "bootloader" = "Install bootloader." 
2023-10-04 - 00:18:12 [6]: [PYTHON JOB]: "Bootloader: grub (efi)" 
2023-10-04 - 00:18:12 [6]:     .. Running ("grub-install", "--target=x86_64-efi", "--efi-directory=/boot/efi", "--bootloader-id=Manjaro", "--force") 
2023-10-04 - 00:18:18 [6]:     .. Target cmd: ("grub-install", "--target=x86_64-efi", "--efi-directory=/boot/efi", "--bootloader-id=Manjaro", "--force") Exit code: 1 output:
 Installing for x86_64-efi platform.
EFI variables are not supported on this system.
EFI variables are not supported on this system.
grub-install: error: efibootmgr failed to register the boot entry: No such file or directory.
2023-10-04 - 00:18:18 [2]: WARNING: [PYTHON JOB]: "Command 'grub-install --target=x86_64-efi --efi-directory=/boot/efi --bootloader-id=Manjaro --force' returned non-zero exit status 1." 
2023-10-04 - 00:18:18 [6]: [PYTHON JOB]: "stdout:Installing for x86_64-efi platform.\nEFI variables are not supported on this system.\nEFI variables are not supported on this system.\ngrub-install: error: efibootmgr failed to register the boot entry: No such file or directory." 
2023-10-04 - 00:18:18 [6]: [PYTHON JOB]: "stderr:None" 
2023-10-04 - 00:18:18 [6]: virtual void Calamares::JobThread::run()
    Skipping non-emergency job "postcfg" 
2023-10-04 - 00:18:18 [6]:     ..  Skipping non-emergency job "Unmount file systems." 
2023-10-04 - 00:18:18 [1]: void Calamares::ViewManager::onInstallationFailed(const QString&, const QString&)
    ERROR: Installation failed: "Bootloader installation error" 
2023-10-04 - 00:18:18 [6]:     .. - message: "Bootloader installation error" 
2023-10-04 - 00:18:18 [6]:     .. - details: The bootloader could not be installed. The installation command <pre>grub-install --target=x86_64-efi --efi-directory=/boot/efi --bootloader-id=Manjaro --force</pre> returned error code 1.
2023-10-04 - 00:18:18 [6]: void Calamares::ViewManager::onInstallationFailed(const QString&, const QString&)
    Calamares will quit when the dialog closes. 
2023-10-04 - 00:18:18 [6]: void Config::doNotify(bool, bool)
    Notification not sent; completion: failed

You might find more details at termbin dot com slash 9cye

Here is further information from the iMac-machine (output from inxi):

System:
  Kernel: 6.5.3-1-MANJARO arch: x86_64 bits: 64 compiler: gcc v: 13.2.1
    clocksource: tsc available: hpet,acpi_pm
    parameters: BOOT_IMAGE=/boot/vmlinuz-x86_64 lang=en_US keytable=us tz=UTC
    misobasedir=manjaro misolabel=MANJARO_KDE_2302 quiet systemd.show_status=1
    splash driver=free nouveau.modeset=1 i915.modeset=1 radeon.modeset=1
  Desktop: KDE Plasma v: 5.27.8 tk: Qt v: 5.15.10 wm: kwin_x11 vt: 2 dm: SDDM
    Distro: Manjaro Linux base: Arch Linux
Machine:
  Type: Desktop System: Apple product: iMac12,2 v: 1.0
    serial: <superuser required> Chassis: type: 13 v: Mac-942B59F58194171B
    serial: <superuser required>
  Mobo: Apple model: Mac-942B59F58194171B v: iMac12,2
    serial: <superuser required> UEFI: Apple v: 87.0.0.0.0 date: 06/14/2019
Battery:
  Message: No system battery data found. Is one present?
Memory:
  System RAM: total: 16 GiB available: 15.6 GiB used: 2.84 GiB (18.2%)
  RAM Report: permissions: Unable to run dmidecode. Root privileges required.
CPU:
  Info: model: Intel Core i7-2600 bits: 64 type: MT MCP arch: Sandy Bridge
    gen: core 2 level: v2 built: 2010-12 process: Intel 32nm family: 6
    model-id: 0x2A (42) stepping: 7 microcode: 0x2F
  Topology: cpus: 1x cores: 4 tpc: 2 threads: 8 smt: enabled cache:
    L1: 256 KiB desc: d-4x32 KiB; i-4x32 KiB L2: 1024 KiB desc: 4x256 KiB
    L3: 8 MiB desc: 1x8 MiB
  Speed (MHz): avg: 1600 min/max: 1600/3800 scaling: driver: intel_cpufreq
    governor: schedutil cores: 1: 1600 2: 1600 3: 1600 4: 1600 5: 1600 6: 1600
    7: 1600 8: 1600 bogomips: 54418
  Flags: acpi aes aperfmperf apic arat arch_perfmon avx bts clflush cmov
    constant_tsc cpuid cx16 cx8 de ds_cpl dtes64 dtherm dts ept est
    flexpriority flush_l1d fpu fxsr ht ibpb ibrs ida lahf_lm lm mca mce
    md_clear mmx monitor msr mtrr nonstop_tsc nopl nx pae pat pbe pcid
    pclmulqdq pdcm pebs pge pln pni popcnt pse pse36 pti pts rdtscp rep_good
    sep smx ssbd sse sse2 sse4_1 sse4_2 ssse3 stibp syscall tm tm2 tpr_shadow
    tsc tsc_deadline_timer vme vmx vnmi vpid x2apic xsave xsaveopt xtopology
    xtpr
  Vulnerabilities:
  Type: gather_data_sampling status: Not affected
  Type: itlb_multihit status: KVM: VMX disabled
  Type: l1tf mitigation: PTE Inversion; VMX: conditional cache flushes, SMT
    vulnerable
  Type: mds mitigation: Clear CPU buffers; SMT vulnerable
  Type: meltdown mitigation: PTI
  Type: mmio_stale_data status: Unknown: No mitigations
  Type: retbleed status: Not affected
  Type: spec_rstack_overflow status: Not affected
  Type: spec_store_bypass mitigation: Speculative Store Bypass disabled via
    prctl
  Type: spectre_v1 mitigation: usercopy/swapgs barriers and __user pointer
    sanitization
  Type: spectre_v2 mitigation: Retpolines, IBPB: conditional, IBRS_FW,
    STIBP: conditional, RSB filling, PBRSB-eIBRS: Not affected
  Type: srbds status: Not affected
  Type: tsx_async_abort status: Not affected
Graphics:
  Device-1: Intel 2nd Generation Core Processor Family Integrated Graphics
    vendor: Apple driver: i915 v: kernel arch: Gen-6 code: Sandybridge
    process: Intel 32nm built: 2011 ports: active: none empty: VGA-1
    bus-ID: 00:02.0 chip-ID: 8086:0102 class-ID: 0380
  Device-2: AMD Blackcomb [Radeon HD 6970M/6990M] vendor: Apple
    driver: radeon v: kernel alternate: amdgpu arch: TeraScale-2 code: Evergreen
    process: TSMC 32-40nm built: 2009-15 pcie: gen: 2 speed: 5 GT/s lanes: 16
    ports: active: eDP-1 empty: DP-1, DP-2, DP-3, DP-4, VGA-2 bus-ID: 01:00.0
    chip-ID: 1002:6720 class-ID: 0300
  Device-3: Apple FaceTime HD Camera (Built-in) driver: uvcvideo type: USB
    rev: 2.0 speed: 480 Mb/s lanes: 1 mode: 2.0 bus-ID: 2-2:3 chip-ID: 05ac:850b
    class-ID: 0e02 serial: <filter>
  Display: x11 server: X.Org v: 21.1.8 compositor: kwin_x11 driver: X:
    loaded: modesetting,radeon alternate: fbdev,vesa dri: r600,crocus gpu: radeon
    display-ID: :0 screens: 1
  Screen-1: 0 s-res: 2560x1440 s-dpi: 96 s-size: 677x381mm (26.65x15.00")
    s-diag: 777mm (30.58")
  Monitor-1: eDP-1 mapped: eDP model: Apple iMac built: 2010 res: 2560x1440
    hz: 60 dpi: 109 gamma: 1.2 size: 597x336mm (23.5x13.23") diag: 685mm (27")
    ratio: 16:9 modes: max: 2560x1440 min: 640x480
  API: OpenGL v: 4.5 Mesa 23.1.7-1 renderer: AMD BARTS (DRM 2.50.0 /
    6.5.3-1-MANJARO LLVM 16.0.6) direct-render: Yes
Audio:
  Device-1: Intel 6 Series/C200 Series Family High Definition Audio
    driver: snd_hda_intel v: kernel bus-ID: 00:1b.0 chip-ID: 8086:1c20
    class-ID: 0403
  Device-2: AMD Barts HDMI Audio [Radeon HD 6790/6850/6870 / 7720 OEM]
    vendor: Apple driver: snd_hda_intel v: kernel pcie: gen: 2 speed: 5 GT/s
    lanes: 16 bus-ID: 01:00.1 chip-ID: 1002:aa88 class-ID: 0403
  API: ALSA v: k6.5.3-1-MANJARO status: kernel-api with: aoss
    type: oss-emulator tools: alsactl,alsamixer,amixer
  Server-1: JACK v: 1.9.22 status: off tools: N/A
  Server-2: PipeWire v: 0.3.80 status: off with: pipewire-media-session
    status: active tools: pw-cli
  Server-3: PulseAudio v: 16.1 status: active with: pulseaudio-alsa
    type: plugin tools: pacat,pactl
Network:
  Device-1: Broadcom NetXtreme BCM57765 Gigabit Ethernet PCIe driver: tg3
    v: kernel pcie: gen: 1 speed: 2.5 GT/s lanes: 1 port: N/A bus-ID: 02:00.0
    chip-ID: 14e4:16b4 class-ID: 0200
  IF: enp2s0 state: up speed: 100 Mbps duplex: full mac: <filter>
  IP v4: <filter> type: dynamic noprefixroute scope: global
    broadcast: <filter>
  IP v6: <filter> type: noprefixroute scope: link
  Device-2: Qualcomm Atheros AR93xx Wireless Network Adapter
    vendor: Apple AirPort Extreme driver: ath9k v: kernel pcie: gen: 1
    speed: 2.5 GT/s lanes: 1 bus-ID: 03:00.0 chip-ID: 168c:0030 class-ID: 0280
  IF: wlp3s0 state: down mac: <filter>
  WAN IP: <filter>
Bluetooth:
  Device-1: Apple Built-in Bluetooth 2.0+EDR HCI driver: btusb v: 0.8 type: USB
    rev: 2.0 speed: 12 Mb/s lanes: 1 mode: 1.1 bus-ID: 2-1.1.1:7
    chip-ID: 05ac:8215 class-ID: fe01 serial: <filter>
  Report: rfkill ID: hci0 rfk-id: 0 state: up address: see --recommends
Logical:
  Message: No logical block device data found.
RAID:
  Message: No RAID data found.
Drives:
  Local Storage: total: 2.16 TiB used: 7.14 GiB (0.3%)
  SMART Message: Unable to run smartctl. Root privileges required.
  ID-1: /dev/sda maj-min: 8:0 vendor: Hitachi model: HDS722020ALA330
    size: 1.82 TiB block-size: physical: 512 B logical: 512 B speed: 3.0 Gb/s
    tech: HDD rpm: 7200 serial: <filter> fw-rev: B35E scheme: GPT
  ID-2: /dev/sdb maj-min: 8:16 vendor: Apple model: SSD TS256C
    size: 233.76 GiB block-size: physical: 512 B logical: 512 B speed: 3.0 Gb/s
    tech: SSD serial: <filter> fw-rev: 0202 scheme: GPT
  ID-3: /dev/sdc maj-min: 8:32 vendor: SanDisk model: USB 3.2Gen1
    size: 114.6 GiB block-size: physical: 512 B logical: 512 B type: USB rev: 2.1
    spd: 480 Mb/s lanes: 1 mode: 2.0 tech: N/A serial: <filter> fw-rev: 1.00
    scheme: MBR
  SMART Message: Unknown USB bridge. Flash drive/Unsupported enclosure?
  Optical-1: /dev/sr0 vendor: HL-DT-ST model: DVDRW GA32N rev: KE06
    dev-links: cdrom
  Features: speed: 24 multisession: yes audio: yes dvd: yes
    rw: cd-r,cd-rw,dvd-r state: running
Partition:
  ID-1: /tmp/calamares-root-pyz1y_5h raw-size: 233.26 GiB
    size: 228.53 GiB (97.98%) used: 7.14 GiB (3.1%) fs: ext4 dev: /dev/sdb1
    maj-min: 8:17 label: root uuid: 12f69f91-cd17-44b2-b8c6-c7cf3c443d2c
  ID-2: /tmp/calamares-root-pyz1y_5h/boot/efi raw-size: 512 MiB
    size: 511 MiB (99.80%) used: 148 KiB (0.0%) fs: vfat dev: /dev/sdb2
    maj-min: 8:18 label: EFI uuid: 28C9-890E
Swap:
  Alert: No swap data was found.
Unmounted:
  ID-1: /dev/sda1 maj-min: 8:1 size: 1.82 TiB fs: <superuser required>
    label: N/A uuid: N/A
  ID-2: /dev/sdc1 maj-min: 8:33 size: 3.63 GiB fs: iso9660
  ID-3: /dev/sdc2 maj-min: 8:34 size: 4 MiB fs: vfat label: MISO_EFI
    uuid: D5F7-911B
USB:
  Hub-1: 1-0:1 info: full speed or root hub ports: 2 rev: 1.1
    speed: 12 Mb/s (1.4 MiB/s) lanes: 1 mode: 1.1 chip-ID: 1d6b:0001
    class-ID: 0900
  Hub-2: 2-0:1 info: full speed or root hub ports: 6 rev: 2.0
    speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 chip-ID: 1d6b:0002
    class-ID: 0900
  Hub-3: 2-1:2 info: Microchip (formerly SMSC) USB 2.0 Hub ports: 3 rev: 2.0
    speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 power: 2mA chip-ID: 0424:2514
    class-ID: 0900
  Hub-4: 2-1.1:4 info: Broadcom BCM2046B1 USB 2.0 Hub (part of BCM2046
    Bluetooth) ports: 3 rev: 2.0 speed: 12 Mb/s (1.4 MiB/s) lanes: 1 mode: 1.1
    chip-ID: 0a5c:4500 class-ID: 0900
  Device-1: 2-1.1.1:7 info: Apple Built-in Bluetooth 2.0+EDR HCI
    type: bluetooth driver: btusb interfaces: 4 rev: 2.0
    speed: 12 Mb/s (1.4 MiB/s) lanes: 1 mode: 1.1 chip-ID: 05ac:8215
    class-ID: fe01 serial: <filter>
  Device-2: 2-1.2:5 info: SanDisk 3.2Gen1 type: mass storage
    driver: usb-storage interfaces: 1 rev: 2.1 speed: 480 Mb/s (57.2 MiB/s)
    lanes: 1 mode: 2.0 power: 224mA chip-ID: 0781:55a9 class-ID: 0806
    serial: <filter>
  Device-3: 2-1.3:6 info: Pixart Imaging Optical Mouse type: mouse
    driver: hid-generic,usbhid interfaces: 1 rev: 2.0 speed: 1.5 Mb/s (183 KiB/s)
    lanes: 1 mode: 1.0 power: 100mA chip-ID: 093a:2510 class-ID: 0301
  Device-4: 2-2:3 info: Apple FaceTime HD Camera (Built-in) type: video
    driver: uvcvideo interfaces: 3 rev: 2.0 speed: 480 Mb/s (57.2 MiB/s) lanes: 1
    mode: 2.0 power: 500mA chip-ID: 05ac:850b class-ID: 0e02 serial: <filter>
  Hub-5: 3-0:1 info: full speed or root hub ports: 8 rev: 2.0
    speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 chip-ID: 1d6b:0002
    class-ID: 0900
  Hub-6: 3-1:2 info: Microchip (formerly SMSC) USB 2.0 Hub ports: 4 rev: 2.0
    speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 power: 2mA chip-ID: 0424:2514
    class-ID: 0900
  Device-1: 3-1.1:3 info: Apple Internal Memory Card Reader
    type: mass storage driver: usb-storage interfaces: 1 rev: 2.0
    speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 power: 500mA
    chip-ID: 05ac:8403 class-ID: 0806 serial: <filter>
  Device-2: 3-1.2:4 info: Apple Built-in IR Receiver type: HID
    driver: appleir,usbhid interfaces: 1 rev: 2.0 speed: 1.5 Mb/s (183 KiB/s)
    lanes: 1 mode: 1.0 power: 100mA chip-ID: 05ac:8242 class-ID: 0300
  Hub-7: 3-1.4:5 info: Dell Keyboard Hub ports: 3 rev: 1.1
    speed: 12 Mb/s (1.4 MiB/s) lanes: 1 mode: 1.1 power: 100mA chip-ID: 413c:1003
    class-ID: 0900
  Device-1: 3-1.4.1:6 info: Dell Keyboard type: keyboard,HID
    driver: hid-generic,usbhid interfaces: 2 rev: 1.1 speed: 12 Mb/s (1.4 MiB/s)
    lanes: 1 mode: 1.1 power: 50mA chip-ID: 413c:2010 class-ID: 0300
  Hub-8: 4-0:1 info: full speed or root hub ports: 2 rev: 1.1
    speed: 12 Mb/s (1.4 MiB/s) lanes: 1 mode: 1.1 chip-ID: 1d6b:0001
    class-ID: 0900
Sensors:
  System Temperatures: cpu: 47.0 C mobo: N/A
  Fan Speeds (rpm): cpu: 938
Info:
  Processes: 262 Uptime: 1h 0m wakeups: 1 Init: systemd v: 254
  default: graphical tool: systemctl Compilers: gcc: 13.2.1 clang: 16.0.6
  Packages: pm: pacman pkgs: 1192 libs: 316 tools: pamac pm: flatpak pkgs: 0
  Shell: Zsh v: 5.9 default: Bash v: 5.1.16 running-in: konsole inxi: 3.3.29

Thanks for all your effort…
Best,
-m