I can't run iTunes 10.7 on my mac os X 10.5.8

The iPhone 5 and iTunes 10.7 require Mac OS X 10.6.8, which requires an Intel Mac. If your Mac is compatible with 10.6, phone the online Apple Store and order it on DVD.

(71444)

As it's a MacBook, it is.

(71453)

1) Make sure your computer meets Snow Leopard technical specifications - http://support.apple.com/kb/SP575 This mostly means making sure it is an Intel Mac and has at least 1GB RAM (more is recommended).

2) Apple no longer carries 10.6 in its stores or online. Telephone Apple to purchase a Snow Leopard disc. In the USA: (800) 676-2775 (contact information for other countries: http://support.apple.com/kb/HE57)

Alternatively you can buy from online retailers but anticipate paying much more than the original price which is the price still charged by Apple

3) Backing up your computer before upgrading is always a good idea.

4) After installing from the DVD, update your Snow Leopard installation using Software Update or manually downloading and installing the Mac OS X 10.6.8 Update Combo v.1.1 - http://support.apple.com/kb/DL1399