Here’s a selection of wallpapers for your computer. (All of this stuff is, by legal means, my copyright- since I’ve taken all the pictures or undertaken all the ‘graphic design’- just a humble reminder)
Right now, I’ve only got them for resolutions native to the 17″ MacBook Pro Unibody (1920 x 1200). Keep checking back for new ones, and if your desktop uses the same aspect ratio (Width to height of 1.6:1) these will work just fine. Right click and save- it’s the fastest way.