I am working on Snow-Leopard 10.6.2 on a relativly new iMac Machine. Since my Max-Based application is growing it is getting really slow while developing. Means it is grabbing 500 MB ram and 500 MB virtual ram. This is working on Max 5.1.0. On my Mac book pro I am running 5.1.1 and I am using Mac Os X 10.5.6. Here the same program uses about 1.3 GB of virtual ram and it is much faster.