We had an issue with Mac OS 10.7 + 10.8 in connection with the compressed savegames.
Sadly it was not possible to repair those savegames, but with the patch from this morning we’ve been able to get it working. Newly saved games should not crash when loading on a Mac OS 10.7 + 10.8. There’s one more crash on the Mac while loading some new savegames. If you’ll run into a corrupt savegame with the latest patch (Build 4391) please contact us and send us your savegame so we can have a look at it. Keep in mind, it has to be from the newest build.