Change desktop background for mac

I am using this info as a joke for my buddy I think he will get a kick out of it please help me

Okay, so I logged onto msn & my computer background colour turned to black. why? I liked my old background photo. Why is MSN...

So, I was wondering if yu were able to change the desktop background on a windows 7 notebook?

ok, when I logged onto my computer a minute ago, it wanted me to install "spy marshall". I've never seen that before in my li...

will some one please help me I am not sure on how to change my bg

what is your desktop background? :D lol. mine is this one picture of a city, its nighttime, and its all lit up. its cool. so ...

There is an update, and it has all changed. Please help! x

How do I change my background in MySpace? I have tried everything i even contacted them and got nowhere. I have seen some c...

My wallpaper changes on my desktop without any prompting from me. When it changes, the wallpaper always reverts to a specifi...

How do I change my email from uk to usa. I was given uk but I live in the usa