I'm a single user - I have an ibook G4 and a desktop mac. both are running on Tiger. My laptop is running on 10.4.11 I've been doing just fine with what I have and didn't even know there was a snow leopard out now LOL - I've been out of touch obviously. I went into a computer store today and saw a nifty wireless mouse and I wanted it for my laptop. Came home and looked it up for the specs and saw that it requires at least a 10.5.8 So..... now I want to upgrade my computers. Well, at least my laptop. I was thinking just leopard but would it be better to just go for snow leopard? I'm not finding a clean install for the leopard - maybe I'm not looking hard enough. And I saw people having issues with their routers running on SL - maybe this issue is fixed now?? Looks like the ibook has 512MB right now. Would I need more to run either leopard or snow leopard? thanks for any help and suggestions.