[ashurman]

I am experiencing the same problem Kinghand. I have exactly the same set-up with MacBook Pro OS 10.6.8 and PT 10.0.1. I am actively watching the System Usage meter and my CPU use is in the low single digits, very simple mix as I am a new PT user, just learning. I just upgraded to PT 10 from the 9 I bought, only using the plugins supplied with the install and only a couple at that. H/W buffer size now 512, have had it up to 1024 with no difference, 2 processors with 90% usage limit. Also would appreciate help with this, thanks.