Aspyr Media today released a patch for Civilization IV for Mac. Version 1.6.1 Rev A offers the following fixes: better performance on certain Macs (particularly G5’s) that exhibited excessive CPU use in the original release; the game should no longer run dual CPU’s to 100% capacity; fixed numerous sounds issues including missing sounds, stuttering, 3D sound positioning, and movie soundtracks; fixed globe graphical corruption at low quality setting; fixed bugs exposed by having the “Big Blue Marble” mod installed in CustomAssets; and more.