No Internet on mac Book

I installed Manjaro on an mac Book pro and i tried to Connect with wifi but when i entered the code from my wifi it just said failed to …
Pls help im using the newest stable version of manjaro kde and the mac is an old Mac Book Pro 5.1

post formatted output from:
inxi -Faz
mhwd -l && mhwd -li
click this icon in editor: </> and copy the output there

The wifi part from here might help, almost at the bottom of the page Dual boot Arch Linux on MacBook Pro Installation

I believe it’s the same broadcom chip than in my mbp 5,4 but do give us your
inxi -Faz
There are various drivers, mainly B43 and broadcom-wl-dkms. Here’s good info how to get B43 to work again How to enable Broadcom Wireless on Manjaro and if that seems a bit much, installing broadcom-wl-dkms I had no blacklisting issues, just needed the kernel headers.

Also seems to set up B43. Had some (firmware?) issues with B43 a while ago which is why I installed broadcom-wl-dkms but these things get fixed and they should both work. Probably a good idea to stick with LTS kernels.