When I woke my Macpro (10.6.8) there was a message that told me this: "Your Mac OS X startup disk has no mor space available for application memory" I had to close windows and remove files from the disk to continue. I still had 1.2 GB free on the disk. There's 12 GB memory RAM. I just restarted and all is well now. I wonder where it comes from. Paul Moortgat