Hello there, (again)!
I purchased Terraria on Steam. And have been playing on my MacBook. I also have desktop PC that runs Bazzite (Linux distro).
I assumed it would just sync the save file between the OS. But it seems that although the sync is not failing, the save data hasn’t been synced. All data is still present on the MacBook. But none transferred over to Linux.
Is multiple OS not supported for Terraria?
Oh I didn’t know that! I found the move to cloud button in the menu. So hopefully this will be synced. I will try to keep local backup every now and then.