Sudo launchctl unload -w /System/Library/LaunchDaemons/_istTo re-enable it, just repeat above command with the 'load' option. To disable it, the solution is quite simple. Last week, I discovered this page at, where virtual memory is shown to be easy to disable in Snow Leopard. Meanwhile, I've been trying to minimize disk swap activity. So one move I planned was to buy a 7200 RPM drive, or even better, an SSD drive. If so, no doubt the disk drive is the weak side of the MBP 2010, as everything slows down when OSX is creating a new swap file. I suspected the paging activities of OSX to be responsible for the general system slowdown. But even with the MBP, some slowness seems to sometimes appear in everyday usage (Parallels 6/Windows7, Firefox, Photoshop, Mail, iTunes always opened), specifically related to the disk activity (a 5400 RPM 320 GB, Hitachi drive). My MacBook Pro, Core i5, 4 GB RAM, 320 GB HD, has been a real pleasure to use my previous machine was an old PowerBook G4, as slow as you can imagine. Advantages, in my case, are obvious, and, so far, with no issues at all. I don't recommend doing it in previous OSX versions, or if don't want to take risks. It involves disabling the dynamic pager daemon and stop using virtual memory at all in Snow Leopard. This hint is the result of an experience I tried in the last few days.
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