Apple just released an update for iMacs sporting either a ATI Radeon HD 2600 Pro or a ATI Radeon HD 2400 XT graphics card. According to Apple, the update will "improve system stability" by installing a firmware upgrade on the graphics cards. This does affect the newly released iMacs.

After this update is installed, you should see ROM version: 113-B2250L-259. You can download the update by opening Software Update (Apple menu > Software Update) on the affected system, or by downloading the installer package directly from Apple.

Apple also notes: To complete the firmware update process, please follow the instructions in the updater application (/Applications/Utilities/iMac ATI Radeon HD Graphics Firmware The updater will launch automatically when the Installer closes.

This article was originally published on Tuaw.
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