I have a Mac Pro desktop and a Macbook with (mostly) duplicate music on. But there is some music I only have on one or the other. Most uploaded from CDs and some bought from itunes, Amazon etc. Each has about 20GB each but as I said it's mostly the same. I want to do a complete clean re-install on the Macbook and then not take up its HD space with music, just use Home Sharing via the desktop/airtunes. Apart from literally going alphabetically through both, is there a neat way of comparing, to make sure that when I clean off the Macbook I don't miss something that isn't on the pro? Thanks.