Changing Wallpaper on a Mac

Would you like to change wallpaper on your iMac or any of Mac notebooks?
Then follow these instructions.

For Mac Users:
How to change iMac wallpaper?
1. From your Desktop, click on Apple→System Preferences.
When *System Preferences window appears, click on Desktop
choose any image you want there and drag it to use as wallpaper.

2. You may try this as well:
To change the desktop background, right-click a picture on any website and choose “Use Image as Desktop Picture.”
Hold down the Control button on your keyboard while clicking on an empty area of your desktop.

Pay attention the the image size. If it is too small then the wallpaper will not look good. If this is a seamless tile-able pattern, then you are OK with a small size image.

The most popular resolutions:

Apple Devices: iPad, iPhone 4, iPhone 5, iPhone / iTouch,

Apple iMac: 27″ iMac, 24″ iMac, 21.5″ iMac, 20″ iMac,

For Fullscreen 4:3
1600×1200, 1400×1050, 1280×960, 1024×768,

For Fullscreen 5:4

HDTV / HD 16:9
1080p, 720p,

Netbooks : 1366×768, 1024×600, 800×480,

Widescreen 16:9
2560×1440, 1600×900,

Widescreen 6:10
2560×1600, 1920×1200, 1680×1050, 1440×900, 1280×800,

PC popular resolutions:
320×480px (iPhone)
1024×1024px (iPad)

* System Preferences can usually be found in the Dock (a square containing gear wheels icon) or you can find it in your Applications folder.