Last month Apple released iMac Wi-Fi Update v1.0 which stated it would resolve Wi-Fi issues when waking up from sleep. Initially I was very pleased, I thought Apple finally managed to resolve the many wireless issues affecting Lion.
Prior to the update, when waking up I would need to turn off/on the wireless adapter to reconnect to my Wi-Fi network. Occasionally I would need to renew the DHCP address. This would usually take about 10-20 seconds and was a hassle.
After installing the update, when waking up from sleep my iMac connects to the Wi-Fi network however it cannot establish a valid IP address (wireless will either have 169.* IP address or no address). The only resolution I have found to reconnect to Wi-Fi requires restarting the computer - which is far more inconvenient than before.
Is anyone else experiencing this issue?
Specs: iMac 2010, 27" with latest version of OS X Lion. Connecting to a Belkin wireless N router.
Apple update information:
Post Date: February 24, 2012
Download ID: DL1501