Hey I've seen lots of questions around Mac support, found this the other day and thought I'd let everyone here know since I haven't seen it posted.

A user made an unofficial mac os client. I've tried it on my M1 and it works really well. I've been playing multiplayer with my friend who was hosting the normal windows version without issue.

Only downside is it doesn't auto update, you'll need to wait for the developer to update the install script. Otherwise it seems fully legit, still downloads the game with your steam account and everything so it's not pirated at all.

Original reddit thread https://www.reddit.com/r/macgaming/comments/1217lko/valheim_macos_build_script/
Github link https://github.com/timkurvers/valheim-macos