I just got my new iphone 5 and had to upgrade my mac (version 10.5.8) version of i tunes. Trying to install and it says i need 10.6.8 or later. What can I do to get this phone installed?

Snow Leopard = OS X 10.6.x

It is Not available as a download... It is a Paid Upgrade.

Do this first...

Check that your Mac meets the System Requirements for Snow Leopard...

Snow Leopard Tech Specs

http://support.apple.com/kb/SP575

If so Contact Apple in your Country to Purchase a Snow Leopard Disc...

http://support.apple.com/kb/HE57

In the US...

1-800-MY-APPLE or 1-800-676-2775

After the Successful Install, run Software Update to get the latest updates for Snow Leopard.

Be sure to make a Backup of your Current System Before Upgrading...