Dear all, I'm starting to get really desperate because I'm not able to solve this on my own. I have built my hackintoshes now for more than 10 years, very successfully, I almost always found a solution somewhere on the net. Now I really hope someone here can point me into the right direction.
Problem:
- Big Sur 11.1 always freezes when idle after 5-6 minutes, sometimes also after 20 minutes. Sometimes with reboot, other times just freeze. But as long as I work with it (heavy duty like Adobe Premiere, Avid Media Composer, Davinci Resolve or just surfing the internet for hours), it's rock solid and everythink works. By "idle" i mean: just leave the computer alone, don't touch mouse or anything.
My system:
- Designare motherboard Z390
- Vega 64, Saphire Nitro+
- 2x nVMEs Samsung 970 Evo Plus
- i9 9900K
- dual screen connected to DisplayPorts on the Vega64
- dual boot Windows 10 (each OS has its own nVME). Windows works perfectly.
More info:
I have no hackintosh kexts inside the OS, I'd say it's vanilla. Never issues with updates.
I upgraded from latest version Catalina to 11.1. With Catalina I was on OC 0.6.3 and everything worked perfectly including iMessage and all iCloud related stuff. The system never crashed. BIOS was F7. PlatformInfo was iMacPro1,1. Headless configuration, iGFX disabled in BIOS.
Before upgrading macOS, I updated OC to 0.6.5, did a config.plist from scratch, updated all kexts. This time I changed Platform Info to iMac19,1 like the guide strongly recomended. Enabled iGFX in BIOS.
For everything I used Dortania guide, which I used before with perfect results:
Current supported version 0.9.1
dortania.github.io
Installation went flewless. Big Sur was up and running in less than 25min. Everything seemed to work. Until I noticed those crashes each time I went to grab a coffee or something and came back to a frozen system or to a reboot directly into windows.
I tried to find my way around in the console, looking for some hints, but I don't really know what and where to look for.
What I tried:
All those things I tried did not resolve the issue but did not make the system more unstable either:
- updated to latest BIOS F9j. I can confirm Thunderbolt works, but USB 3 is gone from those ports. (I didn't know at that time this would break the USB 3 functionality)
- disabled cfg-lock in bios (OC confirms this by using VerifyMsrE2.efi)
- created new USB stick with OC 0.6.6, new config.plist from scratch, all new kext updates (which by that time only were 2-3 hours old). System boots from that USB, I can use the computer normally, no difference - but still freezes in idle.
- changed back and forth between iMac19,1 and iMacPro1,1 SMBIOS
- grabbed my own DSDT.aml and made my own SSDTs patches. Before the upgrade, I just used the standard pre-built SSDTs without any problems.
- I didn't replace OC on the nVME so I'm still on 0.6.5 for now
- enabled/disabled iGFX in Bios.
- in macOS settings:
Turn display off after: never.
Put hard disks to sleep: no
Prevent computer from sleeping...: yes
- screensaver active yes/no - no difference, freeze no matter what.
- uninstall and update third party drivers like Blackmagic design. I did not uninstall NTFS for Mac.
- reset NVRAM in the boot picker
What I didn't try:
- I did not make a complete fresh install of macOS. This system goes back to 10.14 and it was rock stable -almost golden build- for a long time. At that time I was on clover, but in summer 2020 I finally switched to OC 0.6.3 without making fresh install - which worked very well and I'm super happy with the way OC handles things.
- I didn't downgrade/switch the BIOS to other versions.
I'm not sure whether it's a CPU power management problem (C-states or something?) or maybe a videocard thing (Whatevergreen related?) or some USB related stuff...I don't know.
I'm happy to provide more information, but I hope it's enough for now to get me started?
thank you so much.
