Hey Folks,
Actually i worked on a mid 2008 MacBook (2Ghz Core Duo / 4GB Ram) with C6 the last days.
It was a sound design project for a short movie (6 minutes).
No VST or midi was used. The music and effects were arranged before and just imported as wav.
So mostly Plug-Ins like ReVerence or EQ.
At around 40 tracks a lot of crashes and drop out occur.
A kind of bad memory management or just normal behavior?
I know the fact that the old MacBooks just use 3GB of Ram, but C6 used more than 2 GB with around 40 tracks, so in this fact every! available Ram.
Anybody else got this experience with this kind of “old” MacBooks? 
Regards,
Mate