UDesktop.open doesn't work on MacOS

[mattco98]

Unfortunately I don't have a MacOS device to test this myself, but I've received two separate reports of our use of UDesktop.open not working, both from users on MacOS. Apparently, it does open Finder, but freezes the game. Killing Finder does not unfreeze the game, and using it in a background thread has no effect. The first report was about a month ago in ChatTriggers/ctjs#77, and the second was earlier today in our Discord server, both using Fabric 1.20.2. I've temporarily worked around it in ChatTriggers/ctjs@e865018.