Nate Birkholz has posted the remaining bugs in the Mac version of Myth III in the Myth Village forum:
Two A-level bugs:Command-Tabbing to switch from the application causes a crash in OS X.1, and Contraband is fixing this. (We may have to disable Command-Tabbing for the release and try to patch later if possible.)
Selecting a large group of units, changing their formation, selecting a couple more previously-unselected units, and then issuing a new order to the entire group causes a crash (OS X) or a hard lock (OS 9). Contraband is looking into this.
This update comes in response to the recent announcement that Myth III for the Mac won't be on shelves by Christmas.