Overview page: https://www.gog.com/en/anniversary
Direct sign up for Galaxy Linux beta: https://www.smartsurvey.co.uk/t/YEF5EV/
His most recently stated preference is definitely Fedora: Linus Torvalds on Linus Tech Tips
He specifically likes it (over say Ubuntu) because it's easy for him to build/replace the kernel whilst at the same time, it's a "just installs - just works" distro with no tweaking required.
Edit:
I see no evidence that Linus has EVER used MacOS as his daily driver, despite using Mac hardware several times.
This is all way off topic, but "Even Linus I INVENTED LINUX Torvalds doesn't even use it" is wrong.