I need info on how to upgrade my old OS X Version 10.4.11.
Choose About this Mac from the Apple menu and check the processor.
If it's a G3, no further upgrades are available.
If it's a G4 or G5, buy a retail Mac OS X 10.5 DVD from a source such as Amazon or eBay.
If it's an Intel Mac, buy a Mac OS X 10.6 DVD from the online Apple Store.
We can't help you without specific information:
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