updated 11:45 am EST, Sun February 26, 2012
Helps iMac reconnect to networks after sleeping
Apple has issued an update over the weekend specifically for iMacs (late 2009 and newer) entitled Wi-Fi Update v1.0 that is said to correct an issue where the unit does not automatically re-connect to a known Wi-Fi network after waking from sleep. The update requires that users be running the latest version of Lion (10.7.3) and weighs in at 25.81MB. It's available for all supported OS X languages.
The update differs from the EFI update for iMacs and other models issued on Thursday, which was numbered v1.9. That firmware update dealt with issues regarding boot device selection when a USB device was hot-plugged, as well as resolving an issue that could prevent HDCP authentication after a reboot.
The Wi-Fi Update v1.0 is recommended for all Lion-running iMac users. It will appear in Software Update on qualifying machines, or can be downloaded directly from the company's support website.