Imac display flickr and double picture

I have a 27" iMac that i have had for just over the 90 days of phone support. The display just started flickering and showing a double vision about 1 inch above where things are supposed to be. The apple rep when I called in said it was likely a software issue. Ive tried the imac display firmware update but it says that it doesnt need to install it. Does anyone have any other ideas on how to fix it?

HI,
Run the Apple Hardware Test from your install disc just in case.
Intel-based Macs: Using Apple Hardware Test
Try Resetting the PRAM
Carolyn

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Intel imac display glitch and involuntary restart

Just want to know if anyone else has experienced this specific problem, there are plenty of complaints about intel imac displays but I can't be bothered to sift through them all trying to find a match for my problem.
A couple of months ago I was watching a video in quicktime and noticed that my screen was glitching and flashing fragmented diagonal lines - like a commodore 64 loading type thing. Then the spinning-ball came up and a force quit didn't do anything so I had to force shut down. I started up and it occured again. Then the screen went blank/black, but still lit up, and restarted without me doing anything. It also got stuck during start up the second time this occured. I panicked and ran out to buy a 500GB external drive, backed up all of my work and then re-installed mac osx from disk, archive and install job. This seemed to sort it and for the following two months it seemed OK. No sign of any problems.
Since then I have updated from 10.4.7 to 10.4.10 (which I have suspicion that it screwed the firmware in my motu 828 firewire audio interface, costing me a £130 repair - but that's another painful story).
It happened again tonight (the screen thing, not the motu). And the ball came up and I couldn't do anything. Force shut down, restart - screen glitching again. Then I had 2 unexpected restarts, one getting stuck in startup. Then a successful startup but accompanied by the glitchy graphics, mainly red/pink pixellated diagonal lines flickering in and out. I ran a disk first aid - no problems. Did a disk permission repair. Shut down and ran a hardware test, the first few minutes of the test the screen was still at it but then stopped glitching, hardware test found no errors (it was an extended test too). Now I'm back on it and it's all OK.
Any suggestions/similar stories?
When it occured 2 months ago I had the original ram that came with the imac. Now I have 2x1GB sticks of crucial ram.

That's it! Well, that's what I have. Unfortunately, I don't know about the cause, but I don't ever recall having it prior to an update going back about a year ago. I recall an update, and that update being immediately followed by some sort of Apple Graphics something-or-other. I feel pretty certain that's when I first noticed this. I just had my LCD replaced for another reason, but I think you'll agree, it's not an LCD issue. In my case, browser activity, scrolling up or down in a page, seems to be the most common trigger. I've also seen "pieces" of the torn page, on the screen when minimizing the browser to the dock (usually Firefox, but I think I've seen it with Opera and Safari too). Is there a way to find update packages installed somewhere? I'd know it if I saw it, and I'd definitely try removing that suspect package/update.
Message was edited by: geekboy2000 - corrected OS

IMac Display stretched and out of focus

My iMac display is not right. It is slightly enlarged and out of focus. I have already tried the display settings and holding the control key and scrolling down. I also tried restarting. Nothing is working. Last night I tried configuring my router for wireless. I supposedly made it secure with a password, which I had to use to connect to my network. The screen thing happened after that. This morning I checked the connection again and the little lock icon was no longer there. Could the two be related? Please help! I am obviously not very apt with computers, but I'm trying.

This resolved my issues:
Preferrences > Accessibility > Zoom
then, uncheck Zoom and uncheck Zoom follows keboard focus.
Wait a few minutes. You can rechec them again but it won't go back to the stretched and out of focus look. I don't know why.

Question about the new IMac display 2012 and pollution

The IMac late 2010 there is the problem that the fan behind the screen and glass environment pollution such as smoke, candle soot, heating dirt etc fans were absorbed and resulted in contamination streaks on the inside of the glass cover.
A new display technology is applied to the new IMac in 2012 and thus achieved a higher density of the display. Can Apple confirm that with this new display, the old dirt from the inside of the glass are excluded and will no longer occur?
Thank you for answer

Good question, but you're not talking to Apple here, just users like yourself, so I doubt you'll get a definitive answer.

Windows 7 64 bit on iMac display problems and instability

I received my iMac 27" quad core with 8 gig ram & 2 x 1 TB hard drives last Friday. I'm using Boot Camp to run windows 7 64 bit on maximum 2560 x 1440 screen resolution.
I get intermittent but often display problems in windows 7. I get areas of the screen covered in little yellow dots or blue squares (never red artefacts.) This will happen at random areas of the screen, inside an open window, around borders of windows and so on. Most often the screen will go black and come back with a message in the bottom right corner of the screen saying 'Display driver has stopped responding and has recovered' with the sub message saying 'display driver ATI radeon family stopped....etc'. Sometimes I lose the screen wallpaper. Once I've had the system just shut down, once I've had Photoshop seize up and I had to do a cold reboot. Could this be an overheating problem or resolution too high problem or driver problem? Windows 7 tells me my drivers are up to date. I tried installing the drivers for the card from ATI's website which made no difference
The reason I bought a Mac is because it's the only effective way to code for the Mac family of OS's in XCode. The reason I didn't just attach a miniMac to my PC monitor was because there's rather a lot of advertising by Apple about the fact that you can use a Mac with a PC OS via Apple's own Boot Camp. Now I have a lot of Windows software (some of which is not available for the Mac or requires buying again) sitting on an unstable system. Any ideas would be much appreciated...

Sorry, that thread got moved for edit and as a user tip... which I didn't want and won't be doing....
Here is the post:
A tip and workaround for how to get ATI mobility/laptop drivers so that Windows no longer thinks the ATI is a desktop card:
http://discussions.apple.com/thread.jspa?messageID=11286987
Summary (my own edit steps):
1. Install Boot Camp 3.0 and upgrade to 3.1
2. Uninstall graphic drivers and run Driver Sweeper
http://www.guru3d.com/category/driversweeper/
instead of:
removing the crashing driver by going into windows 7 setup via its install cd and deleting the ati driver manaully
3. Install ATI Mobility (link)
4. Uninstall ATI (Programs control panel?) Device Manager (rollback; uninstall?)
5. Device Nanager: update driver and BROWSE BACK to 8.681 (the original apple driver that was causing freezes and purple artifacts) - navigate to /Apple/Drivers/ATI
(Apple uses) a 4850 card in the iMac, its modified a bit for apple. Enough that desktop drivers don't work, and modded-for-laptop desktop drivers don't work either.
Now the upshot of using modified drivers is that it FORCES the catalyst control panel to be installed, meaning you get a few more options to mess around with the card.
I couldn't use the original apple drive, it locks up, the newer one had banding, the newer radeon drivers direct form ATI wouldn't work until they were modded and then they cause black screens.
SO the solution, as obscure as it was, was to download ACTUAL mobility Radeon drivers - version 10.3 still, but made for laptops.
http://support.amd.com/us/gpudownload/Pages/index.aspx
THESE drivers I was able to install - and here is where things changed.
THIS driver changed they way windows saw the video card in device manager.
As I mentioned before, its NOT a desktop card, its a modified laptop card, but installing mac drivers makes windows THINK its a full desktop card, and running the original 8.681 driver crashed it.
Once installed 10.3 LAPTOP driver it now appeared in device manager as a MOBILITY card.
+These Steps "should" work:+
delete ATI driver manually
reinstall apple driver after that and see if that works,
otherwise try the steps above
(mod drivers, remove via windows recovery off setup disk, install laptop drivers, reinstall apple driver over it)

Why does my 08 iMac display flashing and partial window problems?

I have a 2008 iMac with OS X 10.9.2 with 4Gb memeory. In the past week we have experienced partial windows pop up and have unable to close the windows. The problem is resolved by restarting the computer. This has happened about four times in the last week. Today I was using a window and notice flashing when I clicked the mouse with partial windows I had been using previously began appearing on the screen. Any input would be appreciated. Up until this point I have had no problems with this iMac.

Update - I spent a half hour on the phone with AppleCare this morning and we were unable to resolve the issue. I then took both my display and iMac to the Apple Store today and the Genius Bar not only replaced my iMac - they replaced my 24" Cinema Display with a BRAND NEW 27" Cinema Display! The Genius said that Apple's engineers wanted to research why my display was flickering using the exact display and iMac. Incredible service! And a brand new display!

My iMac displays apple and progress bar then shuts off

Hi I heard the apple bar erases the memory when this happens. Does anyone have another option?

The progress bar usually indicates it is attempting a Safe Boot, which does clear some Caches. It doesn't erase the memory.
First, try resetting NVRAM: http://support.apple.com/kb/HT1379
Can you boot into Recovery? If so, try to repair the disk in Disk Utility.
http://support.apple.com/kb/ht4718

IMac ghost display problems (and apple technicians weren't able to solve)

Hi,
So my problem here is quite weird. I tried researching the forum for something like this, but nothing really came close to whats happening to my iMac.
I have an Intel-Based iMac, 24 inch screen.
I bought it on 2008. Since late 2008/early 2009, i had these weird "letters" underneath all my pictures. I work with photography/video editing, so this was very annoying, yet i kept ignoring, since the rest was working fine.
Then slowly the iMac ran slower, more sluggish-y. Like if all life was sucked out of it, sort of description.
Then, 2 months ago, there was a total failure of the HD. I was lucky to be able to back up all, before it didnt let me even enter the computer. It would just think for hours.
I brought it to the technical support near to my home, and i also told them about those weird "letters" on the left side of my screen. They said it was due to my hard disk, and i was, ok...since the hard disk had a failure.
They did a check up, and yep, the hard disk was k.o, evidently. They replaced the hard disk, and told me all was fine.
It did "seem" fine for the first couple days. No more running slow, no weird letters that would distort my pictures (for example, i could see my iTunes music list underneath a picture i was working on photoshop, or a video i was displaying!).
After a couple of days...same story started again. The left side of the screen was flooded by all underneath (open windows, the desktop icons, the texts i had open on safari, basically anything would appear translucently underneath any image or video i would open). Then, flash player would crash every 3 videos, blank cd's would get automatically ejected so i couldnt burn any cd, computer would run slow etc... etc...
So i cleaned up my computer, did a back up, erased all, and ready to bring it up to technical support again. And misteriously, all symptoms disappeared. So i explained to them what happened, and they said probably it was the graphic card.
I thought finally my problem was solved.
24 hrs later, i got an email that my computer was fixed. That it was only a hard disk "permits" issue, and they solved it.
I have had the computer for 3 days, and the screen problem is starting again, and now the permits are perfectly fine in my computer, and nothing comes out as wrong in the diagnostics tool!!!!
I didnt even work with the computer, but now i can see my itunes list through the safari window, as grey letters....kinda 3D, popping out. Its very weird. And i cant capture it because when i take a screen capture, it all appears fine.
Left side of screen is the affected. And no, its not a condensation issue.
Also, i can see some lines when i start up the computer. On the grey screen portion of the start up.
I dont know what it can be anymore. I know this is a long post, but i had to explain all what happened to it.
Any help would be great.
Thanks

You might want to clean up your profile. An iMac G5 will not run Mac OS X 10.6.4!
My experience with things appearing on screen but not in a screen capture is that it is on the display itself and not involving the GPU.
I think that you have image persistence, similar to CRT burn in. It is caused by having the same image appear in the same location over long periods of time, like a Safari window always in the same location, or an iTunes window, etc. The pixels get stuck showing that image.
There are different little apps that folks have developed to get the pixels unstuck. Google LCD image persistence and you can find a number of them.
Here is one suggestion;
http://www.jscreenfix.com/
Dah•veed

New iMac (late 2012) and display configuration

Dear Friends,
I have bought the new imac and I need your help configure the space color I wish to use on it.
I use a Canon 60D to take photos in RAW (CR2) and it is configurated to use Adobe RGB color space (for both RAW and JPEG). When I checked the imac color configuration, it shows me "imac Profile" and other profies, Adobe RBG including. The problem is, when I select show profiles for this display only, it hides both sRGB and Adobe RGB!
Can't I use Adobe RGB the the new imac? If I can, how can I configurate my imac in order to use Adobe RGB. I would like to highlight that, at the moment I selected Adobe RGB, the colors of my wallpaper (the original imac walpaper) gone...
Another question is: can I set my monitor to use Adobe RGB when using Adobe Lightroom only?
Thanks a lot!

renato696 wrote:
I'm disappointed to know that my new iMac is not compatible with Adobe RGB, mainly because I bought it to use with photos. Anyway, I'll try some configurations and let you know if I have some success. Maybe someone within the Community can give some light for us.
Thanks a lot!
You have a slight mis-understanding as to just what a color profile is and how it relates to color spaces, I believe. This can be an extremely complex subject, and volumes have been written about it, but in general...
Simply speaking a color profile maps individual color elements (pixel) values between color spaces. Your Canon 60D generates images in one of two color spaces, Adobe RGB or sRGB (I have a 7D and 5D Mk III). Using sRGB doesn't have as wide a color space as Adobe RGB, but it is entirely suitable for images to be displayed on the web where most of the display devices are closest to sRGB in their native, i.e. uncalibrated, state. Most users never calibrate their monitors so sRGB is always the best choise for the widest audience on the web.
I always take pictures in RAW and use Adobe RGB. When I edit my images in Photoshop or LIghtroom I tell the software that I wish to edit in the color space Prophoto RGB which is a wider color space than Adobe RGB and allows more accurate editing of the colors. Adobe RGB color values are said to be mapped to the ProPhoto RGB color space by the software. It is possible to do this conversion very accurately for two reasons. One, ProPhoto RGB is a wider color space than Adobe RGB, and two, the attributes of both color spaces are precisely defined.
There are three basic actions you can choose from to get your prints to be close to what you see on your monitor.
The first is to use the 'iMac' color profile already on your iMac. This profile was created to provide proper color space conversion for the average or nominal iMac display and any given display can deviate appreciably from this 'nominal' display. It is a decent place to start if you're not too picky about color representation.
The second thing you could do is calibrate your monitor yourself. The most attractive method pricewise is to use the iMac's built in calibration capability. This will in all likelyhood not be very accurate as it uses the Mark One Eyeball (yours) to make the color comparisons and the eye doesn't do a good job at this because so many variables that you cannot control have an effect on the process. It can get you close, though, and may be satisfactory for you (it isn't for me, but I'm extremely picky about color).
The third thing you could do is purchase a color calibration system. These range in cost from around $100 US to several thousand. Look for offerings from companies such as DataColor (Spyder series) and X-Rite.
Basically a color calibration system uses a hardware device to measure the actual colors as displayed by your monitor vs standard pixel colors. It does this for all pixel color values. From this series of measurements the calibration software will create a profile that will accurately map any color space with a defined profile to be a 'best fit' on your individual monitor (iMac display). This method will get your colors to be much closer than the eye ever could.
Regardless of which method you choose I suggest delve deeper into color profiles and color spaces. A good place to start is Jeffrey Friedl's Blog.

IMac display jumps 1 pixel left and right

Has anyone ever heard of this before, it seems crazy to me.
My iMac display started acting up two days ago.
When the cursor crosses the screen from side to side, the screen jumps 1 pixel to one side!
Specifically, moving the cursor from left to right, the screen jumps 1 pixel left (as if it is panning over to that side) and and the reverse for the reverse direction.
The 'extra' column of pixels appears normal (ie not simply black).
The picture is a little fuzzy.
At lower resolutions, the screen looks terribly fuzzy like the anti-aliasing has become overactive (maybe this is a known issue for this video card) but doesn't jump.
I've repaired permissions, rebuilt things, etc (using Onyx and also applejack) but no change.
After my previous mac died prematurely I was sure to get Applecare for this iMac and need to take it back anyway (the dvd-burner has predictably failed) but I I was surprised I'd never heard of my pixel jumping problem before.

More than likely somehow 'Zoom' got turned on.
To disable Zoom, open System Preferences->Universal Access preference pane and disable Zoom.
Mac OS X 10.4 Help: Setting zoom options for viewing your computer screen

Imac display problem, the resolution seems to be unusual, top bar and all folders on the desktop background is off the screen

Need help with 21" imac display problem. The resolution seems to be unsual, everything on the desktop background goes off the screen. The resolution is set at 1920 x 1080

Quit the game and restart the iPad.
To quit the game - Go to the home screen first by tapping the home button. Quit/close open apps by double tapping the home button and the task bar will appear with all of you recent/open apps displayed at the bottom. Tap and hold down on any app icon until it begins to wiggle. Tap the minus sign in the upper left corner to close the apps. Restart the iPad. Restart the iPad by holding down on the sleep button until the red slider appears and then slide to shut off. To power up hold the sleep button until the Apple logo appears and let go of the button.
If that doesn't work try this.
Reset the iPad by holding down on the sleep and home buttons at the same time for about 10-15 seconds until the Apple Logo appears - ignore the red slider - let go of the buttons.

Since upgrading to Yosemite on my iMac, My Mail app refuses to open, Safari won't load, and I can't upload pictures from my iPad... Please help, any ideas very welcome. I've had my iMac since 2011, and have never had any issues to deal with before..

Since upgrading to Yosemite on my iMac: My Mail app refuses to open, Safari won't load, and I can't upload pictures from my iPad...
Please help, any ideas very welcome. I've had my iMac since 2011, and have never had any issues to deal with before..
Thanks

29/11/2014 20:17:01.315 com.apple.xpc.launchd[1]: (jp.buffalo.NASPower)
Service only ran for 11 seconds. Pushing respawn out by 49 seconds.
29/11/2014 20:17:37.013 com.apple.backupd[616]: Finished scan
29/11/2014 20:17:43.108 com.apple.backupd[616]: Saved event cache at
/Volumes/Time Machine Backups/Backups.backupdb/Geoff Lambrechts’s iMac
(2)/2014-11-29-200648.inProgress/9B453663-603F-40B8-AC21-24F05C724E15/.6162AD34- 38F8-30AB-98E0-4A22FB9D311F.eventdb
29/11/2014 20:17:43.207 com.apple.backupd[616]: Not using file event
preflight for Macintosh HD
29/11/2014 20:18:01.561 com.apple.xpc.launchd[1]: (jp.buffalo.NASPower)
Service only ran for 11 seconds. Pushing respawn out by 49 seconds.
29/11/2014 20:18:16.288 com.apple.xpc.launchd[1]:
(com.apple.quicklook[715]) Endpoint has been activated through legacy
launch(3) APIs. Please switch to XPC or bootstrap_check_in():
com.apple.quicklook
29/11/2014 20:18:23.705 com.apple.SecurityServer[56]: Session 100013 created
29/11/2014 20:18:32.046 mdworker[718]: code validation failed in the
process of getting signing information: Error Domain=NSOSStatusErrorDomain
Code=-67062 "The operation couldn’t be completed. (OSStatus error -67062.)"
29/11/2014 20:19:01.662 com.apple.xpc.launchd[1]: (jp.buffalo.NASPower)
Service only ran for 11 seconds. Pushing respawn out by 49 seconds.
29/11/2014 20:19:45.458 com.apple.xpc.launchd[1]:
(com.apple.imfoundation.IMRemoteURLConnectionAgent) The
_DirtyJetsamMemoryLimit key is not available on this platform.
29/11/2014 20:19:59.123 com.apple.xpc.launchd[1]:
(com.apple.PubSub.Agent[725]) Endpoint has been activated through legacy
launch(3) APIs. Please switch to XPC or bootstrap_check_in():
com.apple.pubsub.ipc
29/11/2014 20:19:59.123 com.apple.xpc.launchd[1]:
(com.apple.PubSub.Agent[725]) Endpoint has been activated through legacy
launch(3) APIs. Please switch to XPC or bootstrap_check_in():
com.apple.pubsub.notification
29/11/2014 20:20:01.138 com.apple.xpc.launchd[1]: (jp.buffalo.NASPower)
Service only ran for 10 seconds. Pushing respawn out by 50 seconds.
29/11/2014 20:21:01.484 com.apple.xpc.launchd[1]: (jp.buffalo.NASPower)
Service only ran for 10 seconds. Pushing respawn out by 50 seconds.
29/11/2014 20:21:13.430 com.apple.backupd[616]: Found 4529 files (1.1 GB)
needing backup
29/11/2014 20:21:18.786 com.apple.backupd[616]: 2.82 GB required (including
padding), 1.24 TB available
29/11/2014 20:21:31.775 Console[734]: Failed to connect (_consoleX) outlet
from (NSApplication) to (ConsoleX): missing setter or instance variable
29/11/2014 20:21:34.230 WindowServer[162]: disable_update_timeout: UI
updates were forcibly disabled by application "Console" for over 1.00
seconds. Server has re-enabled them.
29/11/2014 20:21:36.898 WindowServer[162]: common_reenable_update: UI
updates were finally reenabled by application "Console" after 3.67 seconds
(server forcibly re-enabled them after 1.00 seconds)
29/11/2014 20:21:36.971 coreservicesd[83]: SFLEntryBase::ListHasChanged
mach_msg returned 10000004d
29/11/2014 20:22:01.817 com.apple.xpc.launchd[1]: (jp.buffalo.NASPower)
Service only ran for 10 seconds. Pushing respawn out by 50 seconds.
29/11/2014 20:23:02.170 com.apple.xpc.launchd[1]: (jp.buffalo.NASPower)
Service only ran for 10 seconds. Pushing respawn out by 50 seconds.
29/11/2014 20:24:02.547 com.apple.xpc.launchd[1]: (jp.buffalo.NASPower)
Service only ran for 10 seconds. Pushing respawn out by 50 seconds.
29/11/2014 20:25:02.168 CalendarAgent[218]:
[Refusing to parse response
to PROPPATCH because of content-type: .]
29/11/2014 20:25:02.233 CalendarAgent[218]:
[Refusing to parse response
to PROPPATCH because of content-type: .]
29/11/2014 20:25:02.236 CalendarAgent[218]:
[Refusing to parse response
to PROPPATCH because of content-type: .]
29/11/2014 20:25:02.284 CalendarAgent[218]:
[Refusing to parse response
to PROPPATCH because of content-type: .]
29/11/2014 20:25:03.059 com.apple.xpc.launchd[1]: (jp.buffalo.NASPower)
Service only ran for 10 seconds. Pushing respawn out by 50 seconds.
29/11/2014 20:25:12.674 com.apple.xpc.launchd[1]:
(com.apple.imfoundation.IMRemoteURLConnectionAgent) The
_DirtyJetsamMemoryLimit key is not available on this platform.
29/11/2014 20:26:03.464 com.apple.xpc.launchd[1]: (jp.buffalo.NASPower)
Service only ran for 10 seconds. Pushing respawn out by 50 seconds.
29/11/2014 20:27:03.841 com.apple.xpc.launchd[1]: (jp.buffalo.NASPower)
Service only ran for 10 seconds. Pushing respawn out by 50 seconds.
On 29 November 2014 at 19:29, Apple Support Communities Updates <

My 27" iMac displays vertical green lines when turned on and then will not boot up

Can anyone tell me why my 27" iMac displays vertical green lines when it is turned on and then will not boot up?

Welcome to Apple Support Communities
The display or graphic card are damaged. The only thing you can do is to take your computer to an Apple Store or reseller to get your computer repaired.
If you use an external display with your Mac, connect it to your computer and see if these lines appear on the external display. If so, it's a graphic card problem

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I can attach my iMac to my MBP via thunderbolt and run it in Target Display Mode, so that itsimply becomes a screen attached to my MBP.
What I really want is for the keyboard and mouse of my iMac to also operate as if they were attached to my MBP, but I cant seem to achieve this.
Is it possible?

Its a wireless mouse and keyboard - dont think I can re-pair the keyboard to MBP since I need it talking to the iMac to enable and disable TDM?
I expected TDM to natively pass through the mouse and keyboard to the MBP, since that is the obvious user requirement. But this does not happen.
So I guess I want a workaround so my iMac keyboard and mouse can drive my MBP while attached via Thunderbolt cable in TDM mode.

I have just bought four songs from iTunes store using my iMac. I can play the music on my iMac and throughout my Apple TV. However after several restarts and double checks I can't get the four tunes to sync with either my iPhone or my iPad.

I have just bought four songs from iTunes store using my iMac. I can play the music on my iMac and throughout my Apple TV. However after several restarts and double checks I can't get the four tunes to sync with either my iPhone or my iPad. All the software is up to date.

do you use the same Apple ID on your iMac, your iPhone and iPad? This is a requirement.

Imac display flickr and double picture

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