writerinserepeat

8 minutes ago, fabiosun said:

@writerinserepeat welcome here

in the past I have checked if some difference in kernel was there about cores count  limit, and Big Sur gave me a big illusion because 3F parameter seems to not be there..

Asked @meina222 to check..illusion ended immediately 🙂

 

Thanks fabiosun.  I still have grand illusions of my 128 core / 256 thread  Epyc workstation running MacOS on all cores as part of a tri-boot setup.  Extreme overkill I know, but it sounds fun, regardless.  I can always use  Proxmox at 64 cores.  Too bad we can't hack the MacOS kernel and enable more multi-core support, AND Nvidia driver support past HS!   

6 hours ago, meina222 said:

@fabiosun - yes I had disabled SMT. This answers our question from 2 months ago - does BS has 64 limit - yes it does, since boot fails very early otherwise. Issue with me was either Whatevergreen and -wegbeta or MMIO or both. Probably WEG but I am not sure 100% which. For sure now the installer is going. I already rebooted past 1st phase beyond my initial freeze. And my fans now ramp up - before the system sounded suspiciously quiet and was corrupting the BIOS splash boot where OC would print text on top of BIOS image.

 

Will post more tomorrow including altered config.plist for those that may encounter similar issue.

 

I removed.

1. WEG kext, -wegbeta and pikera args

2. Intel I211 kext (just in case, will re-add - what does this kext really gain for my card?)

3. Enabled only the last 2 MMIO addresses in my list - left all other disabled, cautious about my own and @Driftwood's earlier mishaps.

 

My system now clicks on shutdown and shuts, and 1 sec later comes back alive. So still work to do but now it seems very close. Thanks @iGPU! And @fabiosun for the encouragement. This stuff is too time consuming and I almost gave up.

Meina, thank you for this information.  I was curious if MacOS had finally, finally raised the 64 core/thread limit with Big Sur.  Ah well.