jessicarabelli wrote:
It only works for itunes 10.3, so what you need to do is downgrade your itunes or find a computer that has an old version of the itunes
http://ismashphone.com/2011/06/how-to-downgrade-itunes-105-beta-to-itunes-103.ht ml
Thank you, thank you! This fixed the problem. It's a bit of a hack, but it works. It doesn't really take that much time to downgrade, install the iOS update, then go back to 10.5.
Step 6 of the downgrade instructions says to copy and rename the most-recent file in the "Previous iTunes Libraries" folder. I tried this, opened iTunes, and still got the "newer library" error. My second-newest file also had the .itl extension, and copying that one and renaming it allowed iTunes 10.3 to open properly.
BTW, this was on a 2.0 GHz iMac Core Duo, running OS 10.6.8.