Fedora on iMac

I am running fedora 35 on iMac late 2015, 21.5 inch (the 1tb hdd version) and it’s running effortlessly with just one issue,
It reboots on a shutdown.

(Suspend doesn’t work too, it just hangs the system or reboot sometimes but it happens to most Apple devices on linux so i let that slide)

I have tried Linux kernel 5.17 to 5.12 and lts 5.4, all of these had the same issue.

Evidently, I thought it was an ACPI issue so I turned it off with quiet splash acpi=off in the grub file but it didn’t make any difference. I have tried running XHCI > /proc/wakeup/acpi that to led too no difference

I need some guidance to how to fix this issue,
Much gratitude


Did you make any progress, even though you got no reply here?

I began a similar test using the same model iMac, but instead, I have been booting from an SSD (as normally booting into Monterey) and only use the internal disk to to store Carbon Copy Clone sessions.

At first I tried booting from Ventoy liveiso off F37, but it gives a bootloader and quits. After reading about this known issue with Apple’s boot security, they suggested to boot from 36 and then upgrade to 37. So far I have only been able to boot from Ventoy with 36.

One thing of note, the magic mouse is not detected on boot up, so I had to use a USB mouse. It would be good to understand why the bluetooth magic mouse wont work.

Next, I will run the Softwre update to F37.

Any insights you can share?