I've got a 13" MacBook Pro with a very new install of Snow Leopard, fully updated. Every couple of minutes, it seems to completely hang, regardless of what app I'm using, and I get the spinning colorful pinwheel for about 8-10 seconds and then the system springs back to life. Here's some more info: Machine Specs: 2.53Ghz Core 2 Duo 8GB DDR3-1066 RAM 320GB SATA HDD OS 10.6.8 When this happens, I see nothing incriminating in the system logs, no spikes in disk usage, CPU usage, network usage... I've got over 7GB of free (green) RAM. Currently running apps, while experiencing this issue: Finder Mail Chrome (only this tab) Adium (logged out) Skype RealVNC Address Book (no open connections) RealVNC Server Activity Monitor Preview Dropbox Synergy Jumpcut Geektool (basic commands refreshing very infrequently) I let the extended Apple Hardware Test run overnight. No problems found. Any thoughts?? This is severely impacting my workflow and sanity!