Apple has released
iMac Software Update v1.1. It’s available for download from Apple’s Web site and through the Software Update system preference.
The update is intended for Intel-based iMacs released in mid-2007. Those include 20- and 24-inch models equipped with 2.0, 2.4 and 2.8GHz processors.
The update provides “important bug fixes,” according to Apple. It requires Mac OS X v10.4.10.