If you’ve got a new Thunderbolt-capable Mac and you’ve got it hooked up a 24-inch Cinema Display, you’ve probably encountered a bit of flickering every now and again. I know I have, and so have a number of users on Apple’s discussion forums.
Thankfully, Apple has issued to firmware update to resolve the issue, but it won’t be coming via Software Update.
It’s unclear why Apple has chosen to be so quiet about the update, but to get the fix, you’ll have to download and install it manually.
The latest firmware was posted to Apple’s discussion forums after a number of users went to complain about the issue. Those who have applied the fix, however, report that it does work. Though you may have to reboot your system and display in order for it to function correctly after the update.
Apple’s description of the update reads:
The 24-inch LED Cinema Display Firmware Update addresses an issue that may cause intermittent display flickering. This firmware will only install on the Apple 24-inch LED Cinema Display when it is connected to a Thunderbolt-enabled Mac.
This firmware update may not resolve the flickering issue if a Mini DisplayPort extender cable is used.
Some USB and FireWire devices may prevent firmware updates from installing correctly; disconnect non-essential devices and use only an Apple keyboard and mouse to apply the update.
Have you had flickering issues with your Cinema Display, and did this firmware update fix them for you?