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I just got an HP 600 G3 with i5-7500... is there some installation guide? I cannot boot with OC (or Clover).

Hi Flixy98, I have the same Hackintosh you are using (ProDesk 400 G45) and it's a week I'm banging my head trying to install Big Sur (no problems on Catilina and Mojave). Would you mind posting your EFI folder? Thanks a lot.

Solved! After applying latest firmware update the iMac recognizes all 4 slots. I presume that the firmware I flashed (the only one available) was for a 21.5" model, that has only 2 memory slot. Finally an happy end...

I just noticed a strange glitch... The iMac is working fine, but it cannot recognize more than two RAM modules. It knows that 4 slots are present, but doesn't matter which modules I install (size/number/position), it will always view 2 modules.

Doesn't matter anymore, I succeeded by myself this night. I re-edited the clean EFI I downloaded using UEFI Tool to replace the ME section (taken from my original EFI) and this time it re-assembled correctly, as reflashing it on the Mac revived it. Hooray!

Thank you P1LGRIM, but I already tried the procedure described in that tread, but got no success... I have no problem reading/writing the EEPROM with my Raspberry, but reflashing the new EFI with or without ME region gave no result; it's not clear if the EFI available on ghostlyhaks is correct...

xenoshroud, could you please post the procedure to fix the EFI? I bricked an iMac. I found an EFI dump on ghostlyhaks but reflashing it (with or without cleaning it first) resulted in a Mac that didn't boot at all. Reflashing the original EFI takes me back to the boot loop. Do you know how to...

If your BIOS lacks the "add new boot entry" option (e.g. my HP Elite 8300 doesn't have it) you can still add the entry with the following procedure: Download a Linux Live CD and boot fom it (I used Linux Mint 18.2) go to terminal as super user (sudo su) and enable module efivars: modprobe...

Fix: FireWire GUID ffffffffffffffff is invalid! I had this error flooding my logs either, but other than that my FW card works flawlessly. So I got rid of all this log mess changing the file /etc/asl.conf adding this line at the beginning: ? [S= Message FireWire GUID ffffffffffffffff is...