Graphical issues with 2011 iMac and Lion

Apple recently updated FW for iMac :

http://support.apple.com/kb/DL1444

Please check your SoftwareUpdate.

Yes . I think these type of problems related to LION graphic issues.

I hope this will solve your problem.

it says it's not supported... that's weird!! Maybe I already installed it?

You must update FW from Software Update of your iMac.

Go to desktop and click Apple logo.(Top left site of screen).

Click Software Update.

It will automatically check for any update availble for your iMac. (Any update that related specifically for your iMac)

If you want to be sure if you have done this before, you can check you update history through Software Update - Preferences.

First click Software Update, then go to it's preference panel.

Your update history is over there.

😉

Mine told me the same.. it may be an unrelated fix. :-(

OK. This update is not for your iMac.

I have similar problem in my MacBookPro.

My LION is not smooth enough.

Please see this topic :

https://discussions.apple.com/thread/3303101

We hope apple will fix them.

I heard that Lion update 1.7.2 has graphic drivers update in it.

😍

It doesn't show me I installed it, yet I can't install it. Maybe it's not for my iMac? And Siamack do you know when 1.7.2 is coming out?

Dear Niickl;

This is latest news about 10.7.2 :

ℹ "Apple has released a new build of OS X Lion 10.7.2 to developers – build 11C48 – in addition to the 10th beta of iCloud for Mac. OS X Lion 10.7.2 will be released alongside iCloud this fall ..."

Source :

http://9to5mac.com/2011/09/02/apple-seeds-new-os-x-lion-10-7-2-build-icloud-for- mac-beta-10-to-developers/

Apology: Latest build of OS X Lion is 10.7.2 – build 11C48 Not 1.7.2 ⚠

Thank you for the information! I hope this update will fix our problem!

I have the same issue on my 2011 iMac i7 3.4 with the HD 6970M. I have the 1GB version, so it's not just a 2GB video card issue. The computer is only two weeks old. At first I thought it was a hardware problem because the screen seemed to flicker for about the first minute or so after booting up and then would go away. I called Apple Care and they took me through several refreshes. At the time it seemed to work, however the problem still comes back from time to time and I've just work through it till it goes away. Today I tried playing back some footage from my Canon 5D MKii that was located on the OS drive and got the dreaded horizontal pink bars flashing over the video in Quicktime. I thought at first my video was corrupted, but at that moment I also noticed that beneath the Quicktime player the desktop now had frozen artifacts scattered all over the screen looking like the pictures others have posted here; Plus fonts were distorted on the Apple menu bar on top. I rebooted and it fixed it, but for how long? I agree this must be a driver issue with Lion. I'm sorry, this is unacceptable behavior from Apple and needs to be addressed immediately.

I just had this graphical glitch today on my new iMac 27" (Lion was factory installed). I have 3.4Ghz i7, 8GB factory Apple RAM and 2GB 6970M. I was doing a couple things - restoring my iPhone and encoding a video in Handbrake. I was watching CPU in Handbrake and was around 750%. I believe this is an overheating issue. What happened is the top menu bar went black and had horizontal red and green lines. The dock reflective background also had glitches. Some other glitches around some windows were also there. My computer didn't crash and I let my iPhone restore and Handbrake finish. I then simply logged off and logged in again (I did not reboot) and everything is back to normal.

My iMac was getting quite hot and I believe this caused GPU to glitch. Not sure if this is fixable somehow in a software update or not - let's hope so! I wonder if Handbrake also uses the GPU?

It happened again today... I was dumping DV via firewire in iMovie and watching video I had captured from my iPhone 4 using quickview in Finder. So my CPU was not stressed at all. This gives me hope that it can be fixed in software... obviously a driver glitch.

Wonder if there is a way to fix this, like reset the video, without logging off.

I am going to try resizing the display but think I'll wait til my video is done.

I tried several things to "reset" the video but logging off and logging back in again fixes (faster than rebooting at least).

I'm backing up my files, I'm going back to Snow Leopard this is not good, with the new update sometimes my iMac gets slow the glitches keep showing. It's irittating. Keep posting guys ! My Share 😀

Resta, let us know for certain if the glitches stop after going back to Snow Leopard.

I received my brand new 27 inch iMac (3.1 GHz i5, 6970M w/ 1gig) this morning and am experiencing annoying graphical glitches when scrolling in the Finder:

I am running 10.7.1 and have installed the latest firmware update. I hope that Apple is able to address this issue in the very near future. This problem is more or less constant for me unfortunately and is sort of tainting the typical "awesome new Apple computer" experience!