Nope, no crash. Want me to try again? * sleep, close, open, wake up * Still no crash. Not even a delay and Logic doesn't need to think as usual. Everything works as fast as my iMac used to be with 10.6.8. I even have Kontakt 4 and Kore 2 open. Both of them are not "meant to work" in Mountain Lion. But it's your opinion I shouldn't have tried to use those either?