Apple released iMac Software Update 1.2.1 for Mac OS X 10.4.10 users on Tuesday. The update for the glossy display iMac improves performance and reliability when using graphics-intensive applications or video games, and also corrects issues some users experienced when installing Leopard after iMac Software Update 1.2 had been installed.
The update is intended for 2.0, 2.4, 2.8GHz aluminum iMacs and requires Mac OS X 10.4.10. It is available via Appleis Software Update application, and also as a downloadable installer from the Apple Support Web site.