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Thanks! I restored default power settings in system preferences, trashed the system configuration files, rebuilt the cache and rebooted the hack. I'll report back :)

which command do I use in terminal to build a kextcache?

I've been able to boot with the quirks enabled :) I now need to see if it will freeze; the thing it's that it's totally random. It can happen while browsing the net, watching a video/movie and can sometimes freeze on its own; I'll report back. I'll try sleep with the following pmset settings...

PS: the other entry in DeviceProperties is linked to the sound, if I remove it I need to add the proper alcid boot argument to keep the sound right?

I will try disabling the quirks in a minute and seee if it works, just wanted to confirm if I need to enable CFG-Lock and VT-D in BIOS as I'm modifying the plist or leave them disabled? Let's see how this goes first ;)

Ok, I will try this. Concerning the quirks, I have AppleXcpmCfgLock and DisabledIoMapper disabled as I have disabled CFG-Lock and VT-D in BIOS. Here is a new IOReg, hope this one works. Thanks!

Thanks a lot for your answer, appreciate! Following your advice I turned of the iGPU in Bios (iGPU Multi-monitor: disabled on ASRock MB) and Primary Graphic Adapter is set to PCIE. After rebooting, MacOS loaded but system froze but after a hard reboot it loaded ok. While I don't use Xcode...

Thanks for your answer! I am using iMac20,2 SMBIOS which has an iGPU and a dGPU, not iMac Pro, should I turn off IGPU? My understanding is that iGPU should only be turned off if using iMac Pro or another SMBIOS with a dGPU only. Thanks for confirming. Here is...

HI there, First post but I frequently browse this forum, I've built my current hack last summer and everything was working well (using UHD630) until I finally found a graphic card at a decent price and added it. Since then my system randomly freezes and when it happens, I need to hard reboot...