iPhone 4S no longer recognised on iTunes 10.6.3 after iOS 7 update

Hi,

I am having problems with my iPhone 4S connecting to iTunes now I have updated to iOS 7. iTunes says I need version 11.1 for my phone to be recognised (i currently have iTunes 10.6.3) so, I go to download 11.1 and it wont do it because my mac software needs to be updated to OSX 10.6.8! (i am currently OSX 10.5.8) so I go to the software centre to download 10.6.8 but it tells me that my mac is up to date....

Is my mac too old now and Apple no longer support it?... (im on Leopard i believe - old i know!!) I hope not! updating my iPhone to iOS 7 should not force me to buy a new mac! (although i would quite like to update mine 🙂)

Any support that someone can give me would be great becuase I dont live very close to a mac store to go in and ask for help.

Many Thanks

Kezia