HT1338: OS X: Updating OS X and Mac App Store appsLearn about OS X: Updating OS X and Mac App Store apps
Currently Being ModeratedMar 26, 2013 6:47 PM (in response to Itas12)
You need to upgrade to Mac OS X 10.6 and then run Software Update twice.
Currently Being ModeratedMar 28, 2013 2:23 PM (in response to Itas12)
What model Mac do you have? What iDevices do you want to sync?
The current max version of iTunes is 11.x and as a minimum requires OS X 10.6.
For some older iDevices you can use iTunes 10.6.3 and OS X 10.5.