This has been more than frustrating! I bought a new(er) MacBook Pro, running Mountain Lion which I learned I needed to have installed to use iCloud to stream my photos and videos from my iPhone. This computer has an earlier version of iPhoto installed (8.1.2). I installed the 9.4.3 upgrade, and the message said I needed 9.1. I Installed it and the message said I needed to have 9.0 installed before I upgrade to 9.1. I cannot find a download for 9.0 anywhere, nor can I find any correct documentation anywhere to tell me how to do this. Help!