How many CPU Cores Mojave can handle ?

[alohalo]

Asking because off a small bet... Cant remember how to find the info in macOS so that's why I am asking.

Years ago I already know how to find the info but I can't remember , macOS could run 48 hyper threaded cores without any issues years ago.
How is it nowadays ? How many CPU Cores Mojave can handle ?

 

[SecuritySteve]

macOS supports 64 threads maximum, so 32 physical cores maximum these days.

 

[alohalo]

Where your info is coming from? I've extracted the kernel and some more stuff.

There is no cpu core or thread limit.

 

[SecuritySteve]

https://www.insanelymac.com/forum/topic/316804-80-core-hackintosh/

You can edit the kernel yourself to add more, but I believe the system gets unstable after 64 threads if you don't.

 

[alohalo]

If you have a lot of cores they have to be synchronized but thats not related to any limit.

 

[SecuritySteve]

If you read the full thread I linked, you'll see that after a certain thread count the system starts to kernel panic. It is a soft limit as I understand it, but still a limitation.

 

[alohalo]

Can prove that it's just a issue if you don't use tsc sync, so no limit at all.

It's more a bug then a limit