When trying to sync my iPhone to iTunes I get the following message "The iPhone “XXXXXXXXXX's iPhone” cannot be used because it requires a newer version of iTunes. Go to www.itunes.com to download the latest version of iTunes." I have the current version of iTunes. I an still able to sync an iPhone 5 with no issues.
If a device has iOS 9 and the iOS was loaded on the phone with iTunes (as opposed to directly over the air) the computer needs iTunes 12.3 which in turn requires OSX 10.8.5 or higher.
Wow, that is weird ... but (almost) exactly the same predicament I have.
I have a mid 2007 mini with Snow Leopard (10.6.8) and used it to upgrade an iPad 2 to iOS 9.1, which immediately after reported I needed a newer version of iTunes. This evening I just purchased a used iPad 3 with 9.1, and iTunes gives the same message to upgrade.
However my old iPad 3 on 9.1 still connects to iTunes just fine. But that one was upgraded over the air.
Can't sync iPhone 6 w/iOS 9.1 to iTunes
