Here we are, this indicates you have installed Manjaro in BIOS mode. Re-install it in UEFI mode. This is best done when you boot the installation USB stick via the “UEFI” marked entry form your firmware. The Manjaro ISO’s are of hybrid design, they allow both, installation in BIOS and in UEFI mode. You have to take care to choose the right version. Make sure the disk foreseen for the Manjaro OS keeps being formatted in GPT and not msdos with MBR.
Make sure the disk foreseen for the Manjaro OS keeps being formatted in GPT and not msdos with MBR.