I am running an old MacBook 2.1 Intel Core 2 Duo on OSX 10.4.11. I want to get an iPod Touch 4, but I read that it needs OSX 10.5.8 or later. I haven't done an upgrade like this before, so can somebody talk me through the basics? If I bought this Mac OS X 10.6 Snow Leopard for £26, would that do the job? Any help much appreciated!