Parallels 8, Build 8.0.18608 for Mac Windows 7 Mt Lion 10.8.4 The program is Glacially SLOW on the Mac. It is taking up to 250% of CPU. I have 2 cores devoted to it on my 8 core Mac. THe program when active brings all my other applications and desktop to a halt in the Finder. The program is almost unusable. I have to turn it off to do any work on the rest of my machine. Model Name: Mac Pro Model Identifier: MacPro3,1 Processor Name: Quad-Core Intel Xeon Processor Speed: 2.8 GHz Number Of Processors: 2 Total Number Of Cores: 8 L2 Cache (per processor): 12 MB Memory: 10 GB Bus Speed: 1.6 GHz Boot ROM Version: MP31.006C.B05 SMC Version: 1.25f4 ATI Radeon HD 2600 Adobe Design Suite Pro CS6.5 Mt Lion 10.8.4 Safari 6.x