I have an iMac G 5 running Mac OSX 10.4.11 and want to install an iTunes update 10.4.11 so I can use an iPod Touch. How or where do I find this update in iTunes?
You don't find it in iTunes. You check sites such as Amazon or eBay for a retail Mac OS X 10.5 DVD, install it, and run Software Update.
Retrieving data ...