I currently have my iTunes .xml and other databases on my Mac mini. However, my actual music files are on an external drive. I would like everything on the external drive. However, try as I might, I cannot open my iTunes library files when they are on my external drive. If I start iTunes holding down the alt key, I cannot select the library files on the external drive because they are greyed out and cannot be selected. The exact same file when copied to my Mac mini works fine. Any ideas why the library files are greyed out when accessed on an external drive? It is formatted in the mac file system (journaled). Please help!