While not with the same configuration (I'm using one of the old G5 iMacs with Maya 7 & 2008) I have no problems what so ever.

The good news is that the iMac 2.8 GHz is officially supported by Autodesk. You can see the qual chart here: https://download.autodesk.com/us/qual...aphics_mac.pdf

Also, this is posted in the wrong area. It should have been posted in Technical Issues. There's a higher percentage of people seeing it there too.