IMac has coloured horizontal lines in the menu bar

Do you know what is causing this? It occurs quite often even after restarting. YouTube videos also flash green a lot while watching them. The volume indicator also displays as below. It's a mid-2011 iMac12,2.

FWIW, those are vertical lines. For your issue, contact AppleCare's Express Lane. Do note that if you're within 50 miles (80 KM) of an Apple repair station, you're eligible for onsite repair since yours is a desktop machine.

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My iMac has coloured vertically lines on starting up after a short while goes to blank screen

My IMac has coloured vertical lines on startup eventually changing to a blank screen

i have similar problem with macbook pro. https://discussions.apple.com/thread/4530266
but after resetting NVRAM (I followed the instructions from here http://support.apple.com/kb/HT1379) it runs normally, and appear from time to time now.
is it graphics chip, rkaufmann87?

Many of my photos appear briefly as I scroll down the page then disappear leaving a box outlined with a broken-line. The menu bar says that I have 300 pictures hidden, but I am unable to get them unhidden.

I am experiencing difficulty with iPhoto '11. Some of more recent photos can not be accessed. As I scroll down the page of photos, the most recent ones appear briefly, then disappear to be replaced with a box outlined by a broken-line. The menu bar says that I have 317 photos hidden. Hiding photos is not something that I normally do, can't imagine why these are hidden. Anyway, when I try to unhide the photos, I can view them as an event, but if I click on a single photo, or try to move it into an album, the photo does not display. Instead I get a dark exclamation point within a triangle. Another problem with these same photos is on the event page there is no key photo for these events only a dark screen. I can't find an answer to my problem. Has anyone experienced this? What is the problem and how can I correct it?

The ! turns up when iPhoto loses the connection between the thumbnail in the iPhoto Window and the file it represents.
Option 1
Back Up and try rebuild the library: hold down the command and option (or alt) keys while launching iPhoto. Use the resulting dialogue to rebuild. Choose to Rebuild iPhoto Library Database from automatic backup.
If that fails:
Option 2
Download iPhoto Library Manager and use its rebuild function. This will create a new library based on data in the albumdata.xml file. Not everything will be brought over - no slideshows, books or calendars, for instance - but it should get all your albums and keywords back.
Because this process creates an entirely new library and leaves your old one untouched, it is non-destructive, and if you're not happy with the results you can simply return to your old one. .
Regards
TD

How do I get rid of this black line under the menu bar?

This last update's UI ugliness is a black/dark gray line under the menu bar:
http://i.imgur.com/Av7XTOi.png
How do I get rid of it?

The developer of Classic Theme Restorer maintains a support thread over here: http://forums.mozillazine.org/viewtopic.php?f=48&t=2827985
Sorry I can't help you myself, I am still using Firefox 28 while I try to Customize the 29-plus versions without resorting to using CTR. I have tried it, but I prefer doing my own "cobbles" rather than rely upon an extension that "restores" much what I didn't like about Firefox 4.0 thru 28 and overrides what I do like about Australis. IOW, CTR 'fixes' things about 90% opposite of what I would do, if I had the talent to do a "retro extension".
''IMO, the orange Firefox button was the worst thing that Mozilla has ever done to Firefox. The Menu bar worked fine before Firefox 4 came out and still does, it just doesn't have be showing all the time = Compact Menu and its' derivatives over the years was the 'ticket' for me starting from before Firefox was even named Firefox.''

I am using Mavericks. I had a list of VIPS and used it extensively. Now it has disappeared and VIPs on the menu bar is faded. There is nil response to VIP in help. Can you tell me what has happened?

I am using Mavericks. In Mail I had a list of VIPS and used it extensively. Now it has disappeared and VIPs on the menu bar is faded. There is nil response to VIP in help. Can you tell me what has happened?

Triple-click anywhere in the line below on this page to select it:
~/Library/Mail/V2/MailData/VIPSenders.plist
Right-click or control-click the highlighted line and select
Services ▹ Show Info in Finder (or just Show Info)
from the contextual menu.* An Info dialog should open.
Does the dialog show "You can read and write" in the Sharing & Permissions section?
In the General section, is the box labeled Locked checked?
What is the Modified date?
If you don't have read and write access to the item, change the settings as directed here. Note, however, that if one file has wrong access settings, most likely others do as well. If the item is locked, unlock it.
*If you don't see the contextual menu item, copy the selected text to the Clipboard by pressing the key combination command-C. Open a TextEdit window and paste into it (command-V). Select the line you just pasted and continue as above.

HT4061 My ipad has coloured horizontal lines

My Ipad has got coloured lines running accross the middle of the screen. Is there anything I can do to get rid of them

First thing to try is a reboot of your iPad. Press and hold the Home and Sleep buttons simultaneously ignoring the red slider until the Apple logo appears. Let go of the buttons and let the iPad restart. See if that fixes your problem.
If that doesn't help take your iPad to an Apple Store for a consultation. Make an appointment first.

Help!! My Zen V Plus has a black line across the disp

Hi can someone please help me, my v plus display has a horizontal line across the screen and it really ruins everything. Can this still be fixes? Would anyone know this problem or had the same experience?

I have had similar bugs. If your player is still in warranty, your best bet would be to contact the store of purchase or Creative, explain your problem and ask for a replacement.

Horizontal lines on the screen.

I just purchased a MacBook within the last 3 weeks. Every time l switch on my Mac l get coloured horizontal lines on the right hand side of the screen. When l switch if off and on again the lines disappear. Anyone else experiencing this problem. Do you think it’s a fault with the laptop? Any help would be appreciated.
Thank you in advance.
Louise t

I would get it looked at. You may have a graphics circuit issue.
-Bmer
Mac Owners Support Group
Join Us @ MacOSG.com
iTunes: MacOSG Podcast
 An Apple User Group 

Problems with horizontal lines on the iMac. Someone knows the solution?

For several months my Imac has horizontal lines have been growing. Problems with horizontal lines on the iMac. Someone knows the solution?

You have 14 days to return the computer w/no questions asked. Plus you have 90 days of FREE phone tech support on top of your standard 1 year warranty unless you also purchased AppleCare which gives you an additional 2 years of coverage plus FREE phone support.
Strongly suggest that you take FULL advantage of the above before it runs out. Let Apple deal w/the problems.
That being said, no new Mac comes w/Snow Leopard which your profile confirms you have.
Mac OS X (10.6.8)

Why do i have a grey thick horizontal line on the bottom of my screen imac

hello
I been having a problem with my iMac 21.5 inch mid 2011 since this monday January 7,2014. Theres a grey and some times black thick horizontal line at the bottom of the screen, I cant see my programs at the bottom of the screen. First its black then turns into grey and it starts flickering and then it stops flickering and it wont go unless I turn off my mac or put it to sleep, and then like an hour it comes back again. please could you help me Thank you.

Hello Armando
Check out the article below for troubleshooting your issue with the display. There are a few things that can be done, like changing the resolution of the display and also to reset the NVRAM to see if that resolves that for you.
Apple computers: Troubleshooting issues with video on internal or external displays
http://support.apple.com/kb/ht1573
Regards,
-Norm G.

Installed Firefox on Windows 7 but the menu and icons bar is full of little horizontal lines over the icons and menu bar..

I installed Firefox 21 on a new Windows 7 OS. The menu bar and the icon bar at the top of the windows is full of little horizontal lines. Sometimes there are more lines and sometime less lines. It makes the icons and the menu items almost impossible to see. So far it's only the Firefox screen that does this. The other programs I installed so far doesn't do this.
Any ideas?

Hello,
The Reset Firefox feature can fix many issues by restoring Firefox to its factory default state while saving your essential information.
Note: ''This will cause you to lose any Extensions, Open websites, and some Preferences.''
To Reset Firefox do the following:
#Go to Firefox > Help > Troubleshooting Information.
#Click the "Reset Firefox" button.
#Firefox will close and reset. After Firefox is done, it will show a window with the information that is imported. Click Finish.
#Firefox will open with all factory defaults applied.
Further information can be found in the [[Reset Firefox – easily fix most problems]] article.
Did this fix your problems? Please report back to us!
Thank you.

Source Monitor has horizontal lines along the video

Hi,
In the source monitor [only after the video is rendered] I get these horizontal lines across the video. Looks like this http://yfrog.com/7bpremierproblemj
I was wondering if anyone knows how to fix this? Also, the rendered file is fine which really confuses me and if I click on the video in the source monitor then it is restored back to normal, until I click off it then it goes back to having those lines.
Thanks
PC specs:
Intel quad core Q8300 2.50ghz
4Gb RAM
ATI Radeon HD 9570
500Gb Hard Drive
120Gb Hard Drive

Thanks for correcting me there 'vertical line'.
I've recently installed new drivers and I still have that problem. Driver errors wouldn't explain why the video is fine when I import it. If my computer struggled to play the video then the exported file would have the vertical lines to, however it is fine.

My Classic developes two thin horizontal lines across the top third of the screen.

After a day using my classic in the car, I plugged it into its speaked dock and niticed two thin horizontal lines all the way across the top third of the screen.
Does anyone know how to get rid of them pleaase. Thx

You can try Resetting the iPod, won't work, if LCD screen is damaged or the display chip surface mounts has gone wobbly, which mean going in for servicing.
Otherwise.
Press Menu and Center button for 10 secs till the Apple logo comes on, then release the buttons.

HT201177 I have a horizontal line in the bottom 1/3 of my screen display that I can't get rid of

I can't seem to get rid of this black horizontal line in the bottom 1/3 of my display its there in all applications and there appears to be a shadow bar behind it? any help would be appreciated

What model iMac? This forum covers three different variants made before 2006. They have different display technologies.
Doing "About this Mac" from your Apple menu and posting the info found there for your processor type is a good start. If that shows you have an Intel processor, those iMacs are different enough to have a separate forum here:
iMac (Intel)

Pictures taken with my 1D Mark IV show a blue horizontal line at the bottom from ISO 400 onwards.

Pictures taken with my 1D Mark IV show a blue horizontal line at the bottom from ISO 400 onwards. So far nobody has been able tot tell me the cause of this problem. The body is still quite new (15000 pics taken).

I agree that it looks like a column of photosites is not working. But... I'm curious as to why this would only happen at ISO 400 or above.
The sensor is covered with photosites -- they are monochrome. On top of the photosites is the "bayer mask". The mask is a checkboard pattern of red, green, and blue "lenses" which makes the photosite beneath only sensitive to that particular color. They are group in clusters of 4 photosites in a 2x2 matrix. Two of the four squares (in opposing corners) are green. One corner is red. One corner is blue. If you were to lose a column which happens to be along the red/green column (as opposed to the green/blue) then you'd lose red sensitive and half the green sensitivity in that column. The result would be that this column is flanked by two "working" columns which are full of green/blue photosites... hence the teal blue look.
I do not know if this will work for you, but oddly... you can actually sometimes "clear" stuck pixels (but usually this is an indvidiual stuck pixel... not a whole column of them) by putting the camera into manual sensor cleaning mode (and you may have to do this 2 or three times). While the normal point of the self-cleaning mode is to flip up the reflex mirror and open the shutter so that you can inspect and clean the sensor (really the front-most filter because you can't actually touch the real sensor), it also neutralizes the charge on the sensor (or so I've read). This charging and discharging of the sensor a few times can often get "stuck" pixels to start working again. BUT AGAIN... I've only ever seen this used on individual stuck pixels... never a whole row.
Tim Campbell
5D II, 5D III, 60Da

IMac has coloured horizontal lines in the menu bar

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