Update: Since the Mac client didn't work, I decided to simply try and install the Windows client using Wine instead. It took a lot of trial and error to figure out how to solve some DirectX errors I was getting but eventually I managed to get the game to launch perfectly. It runs as well as the native Mac client did, maybe even a little better, which means it's not completely smooth but should be playable. It's funny that the official client wouldn't work but my own Wine wrapped version does lmao. When the game goes on sale again I will definitely buy the Windows license. If anyone has the same issue and would like to try what I did, I'll be happy to (attempt to) explain my solution.