Hi Max, I'm running C2 on a OSX with no problems noted yet. I have gotten an occasional program crash when opening files created in C1 directly but it hasn't been consistent or compromised the files in any way. Opening Carrara first and then opening the C1 files seems to be the work-around. Mac dual processor capability has been restored to C2 so if you're running a dual system it's a must-have upgrade. Additionally, if you're considering moving to OSX, the great advantage is multithreading/multitasking. Starting a render in Carrara and then opeining other programs and working on them during the render has been a great workflow enhancer here. Mark