I'm trying to run SimCity 4 Deluxe on my 12 Core Mac Pro with OS X Yosemite (10.10), but the game keeps freezing when I'm playing. Have to cmd+option+esc, and constantly save during the game so I don't lose much data. It's a pain to have to relaunch the game every 3 minutes.
It appears that the CD version of this game is just too old to run on OS X 10.10 Yosemite. The solution was to purchase the updated game via Steam or the Mac App Store.