Hello everybody! I have just bought one of the new iMacs (21,5", with 3,33Ghz and 8Gb Ram). Installed Logic Pro 9 (3hours) and everything seemed to be OK. But now: I still don't have the audio interface (my old Mbox isn't compatible with Snow Leopard), so i opened Logic using my usb keyboard (M-Audio 49 Oxygen). The PROBLEM: After playing during 5 minutes with the virtual instruments and checking different instrument galleries, the complete OS crashes suddenly! The screen remains black with a distortion image of the program in the center of the screen, and the computer starts to emit beeps. (And I have to force the shut down.) I did also reinstall the whole OS and Logic software, but it didn't fix nothing. Right now, I opened 3 times Logic using the keyboard and it crashed all 3 times after those 4-5 minutes playing! !! Does somebody know what is happening wrong? Any suggestions?? Thanks in advance!