My new iPhone 4S doesn't sync with my iTunes/ Mac OS X 10.5.8. Do I need to purchase Mac OS X Snow Leopard 10.6 in order for my new iphone to sync to my iTunes?
In the case of an iPhone 4S, no; click here.
In the case of an iPhone 5, yes.
Thanks Niel for your help. I was able to download iTunes 10.6.3 and sync my iPhone 4S.
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