Hey, My machine: 2008 iMac 4gig ram 3.06ghz 8800graphics card I've installed Mountain Lion and it's fine, but it pauses or slows a bit too much for my liking in relation to safari and video. Not a lot, just enough to distract. So I'm wondering if I should do a clean install as I just did an update from SL. Is anybody using ML on a 2008 iMac? How's it running for you? Thanks.