About iMac Software Update 1.2.1 (Tiger)
The all-new, all-in-one iMac packs a complete, high-performance computer into a beautifully thin design. Available in 20- and 24-inch widescreen models, it includes built-in wireless, Mac OS X, and the new iLife ’08. So within minutes of opening the box, you’ll be doing everything from sharing photos to creating movies to building websites.

Learn more about the iMac.

What’s New in this Version
This update is for 20-inch and 24-inch aluminum iMac computers with 2.0, 2.4, or 2.8 GHz processors running Mac OS X Tiger.

It improves the performance and reliability of graphics-intensive games and applications and fixes an issue that some customers encountered when installing Mac OS X Leopard after applying iMac Software Update 1.2.

For further information on this Update, please visit this website.