There have been a some reports that followed the release of Mac OS X Lion from iMac users complaining about graphic or video problems.
One user reports that he’s been experiencing video artifacts on his 2011 27-inch iMac configured with a 3.4GHz quad-core Intel Core i7 and AMD Radeon HD 6970M graphics processor with 1GB of GDDR5 memory. It’s been fairly intermittent and it always disappears for a while after a restart.
Today the problem was so different and a lot worse than usual that they finally decided to call AppleCare.
Here are the graphic anomalies that he saw on his iMac.
The task switcher is involved and so is the menu bar. The menu bar exhibited the same graphic anomalies where ever there was text displayed.
Relaunching Finder did not resolve either issue and a hardware test didn’t turn up any hardware errors. A call to AppleCare and speaking with a Senior Advisor hadn’t turned up a solution at press time.
I’ve seen some similar graphics anomalies on my 27-inch 2011 iMac and they usually vanish for a while after restarting. However, I also see mine appear on the lock screen when it prompts me for my password to unlock my iMac.
Are you still experiencing graphic anomalies on your iMac or other Mac after upgrading to Mac OS X Lion and installing all the latest updates?