I want to upgrade OSX 10.4.11 and am not sure what to download.

Dudley31 wrote:

... Can I find such a driver somewhere?

Have you checked with its manufacturer?

If you want to upgrade OS X the easiest and least expensive option would be to purchase Snow Leopard from Apple. The intervening OS X release, Leopard, is no longer available from Apple and is unreasonably expensive from aftermarket sources.

To purchase Snow Leopard online:

(US) http://store.apple.com/us/product/MC573/mac-os-x-106-snow-leopard

(UK) http://store.apple.com/uk/product/MC573/mac-os-x-106-snow-leopard

Elsewhere: call the phone number in the Apple Online Store

Apple's price is $19.99 or £14.00. It is not available to download from any legitimate source.

Mac OS X 10.6 "Snow Leopard" System Requirements

• An Intel processor
• An internal or external DVD drive, or DVD or CD Sharing
• At least 1 GB of memory (RAM) (additional RAM is recommended)
• A built-in display or a display connected to an Apple-supplied video card supported by your computer
• At least 5 GB of disk space available, or 7 GB of disk space if you install the developer tools

After you install Snow Leopard you can decide if you want to upgrade OS X to the latest version, Mountain Lion. Mountain Lion is available in the Mac App Store, which is available to you after upgrading to Snow Leopard.

What printer is it?