Hi all I've got to upgrade from Leopard to Snow Leopard, and I've read that it's a good idea to have not just 5GB spare on your hard disk to do this but more like 10GB spare. I only have the factory 1GB running at the moment and it's very very full and slow so I am wondering whether to: 1. Sift through everything on the iMac (mid 2007) and clean up enough space to install SL and then carry on as usual. 2. Install extra RAM and just be done with it, basically make more space that way. 3. Third option I don't know about yet..? Am I even on the right track here? Can I just chuck in some extra RAM chips and then load up SL without bothering to clean up the hard disk? (Right-brained artist, you may need to dumb it down a little!) Any advice would be great, thanks.