iPhone 6S does not sync with Snow Leopard
I just had an iPhone 6S+ gifted to me as my iPhone 5 was nearing 3 years old with a failing battery. However, this is not syncing with my older Mac Pro 1,1 running OS X 10.6.8 Snow Leopard. I have to download a newer version of iTunes 12 which, naturally, cannot install on this OS. As far as I know, Lion is the latest version of OS X this machine can run, period, and the newest iTunes won't run on Lion either.
I realize the obvious option is to upgrade my machine but that is unacceptable just because I've gotten a new phone. Going back to the 5 is also not a possibility since the phone has been recycled. So I need some kind of solution or at least a temporary workaround so I can get some of my old iPhone settings back.
Thanks in advance.
Equipment:
iPhone 6S plus (out of the box)
Mac Pro 1,1; Dual-Core Intel; 8 GB RAM
OS X 10.6.8
iPhone 6 Plus, iOS 9.0.2