obvious if u have a better processor it would run better. i dont expect it to be faster or as fast as SL(currently on all my machines) but is it usable? does shutting down still take forever on ML? I have tried upgrading to Lion several time(hoping the patches would improve it) but had to go back to SL. ADDITIONAL OPTIONAL QUESTION: My friend actually bought a mbp in 2011 with Lion preinstalled. My mbp running SL launches, boots, and shuts down faster than his i5 processor. He would like to know if this is normal? and would upgrading his machine to ML improve his time.