Line Through Desktop Background

Recently a horizontal line has developed through my desktop background. If I switch backgrounds, it goes away for a while, but then reforms. It begins on the left-hand side of the screen, and then progresses horizontally across with time. It always occurs at about the middle of my screen. It DOES NOT cross through any window I have open. It is only in the desktop pattern. Is this a software or a video card problem?
Thank you in advance for your help!

I don't have the right cable to hook up an external monitor, but that would be a great idea.
The only tool I have to test with is Tech Tool Deluxe which said the Video Ram was OK, as well as everything else it checked.
I noticed that I now have a line up at the top of the screen. Time to contact Apple Support.
Thanks!

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Thin white lines on desktop background

After having my computer on for a while, one or two thin horizontal white lines will appear on the screen. They are around a few inches long, and never appear in the same place twice. They only affect my desktop background, not any windows or screen saver at all.
Reloading the desktop background or restarting the computer makes the lines go away, but I'm wondering what is causing them, and if it's a sign of some underlying problem.

Insert your MacOSX DVD
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Perhaps a video memory problem. If yes motherboard is dead !

Mac Mini (10.5.8) won't stop cycling through "Nature" desktop backgrounds.

My Mac mini is changing its desktop background by itself about every 30 seconds, strictly from the "Nature" folder of backgrounds. Tried switching to a different folder with a different desktop, but it will revert back to the nature folder after holding it for about a minute. I don't have it set to change the image. Using an LG monitor.

This is just the settings for Desktop & Screen Saver, let me know if you need screenshots of any other settings.

Line through a circle symbol, can't find a way around it! Help please!

On start up of my MDD G4 I am getting a no entry symbol, a circle with a line through it.
To give the full background of events, 2 evenings ago the Mac froze up for no reason, at the point I think where the screensaver would’ve activated due to inactivity. There was only mail and firefox running at the time, no videos or anything – this error, or at least the freezing of the Mac (no movement even from the mouse) repeated itself later on that night and yesterday evening as well, although the next evening the Mac wasn’t on long enough for the screensaver to start up. On those occasions the Mac restarted fine. Last night however I got the circle symbol but was able to hold down option key and select my previous drive to start up with, I ran Diskwarrior and it found a few faults with my main larger drive and repaired them and the Mac restarted with the larger drive as it’s startup drive absolutely fine. I put the Mac to sleep last thing at night, however this morning it failed to wake – note that the power lights on the Mac and Apple Monitor were glowing and fading fine as they should.
When I restarted the Mac via the power button on the Mac it started up fine, I had the Mac symbol with the spinning icon (not sure how you describe it!) as normal, however the fans then slowed down as did the hard drive noise and that’s when the circle with the line through symbol appeared.
So far I have tried disconnecting all peripherals from the Mac, resetting the PRAM, resetting the CUDA switch on the motherboard, starting up holding X and starting up from my Diskwarrior CD – unfortunately even the startup using the Diskwarrior CD fails to bring up a desktop of any sort and instead brings up the circle with a line through it.
Can anyone shed anymore light on potential problems or more importantly solutions as I’m tearing my hair out on this one!!
As further info, there are 2 other additional hard drives in my G4, one of which was my main startup drive for around the last year (a 500Gb drive connected via PCI card), which has worked flawlessly until now. I have tried starting up with this drive disconnected but to no avail.
One more piece of information which may help is that if I hold down the option key at startup the Mac does see both OSX system on my original and additional hard drives (and Diskwarrior CD if inserted) – however no matter which one I select it goes no further than the line through a circle symbol.
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One of the Level 4's, the Hatter (I hope he stops by personally) gave me the following insight:
The hatter wrote:
A really badly corrupt directory can prevent booting from any drive or media, because they all look to see what other boot volumes are out there.
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Try booting after removing or unplugging the hard drive. May need to pull it and put in FW case to recover anything.
So what could have happened when you crashed is that there was disk damage, probably to the disk directory. If that happened say to a single HD, then according to the Hatter, you won't be able to boot from any drive since there's a kind of checking to see what other drives are boot volumes out. That check could be failing in your case because of the directory corruption.
You have two HDs in your MDD, so either one or both could have suffered directory corruption.
If I understood one of your posts, you disconnected the SATA drive, and still saw problems. If so, perhaps your old HD suffered corruption.
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If you can boot from CD with no HDs, then we've got it narrowed down to directory corruption. Thereafter, you might see if you attach only the SATA if you can boot to diagnose the just that drive. If you can, that's great because it would mean your backup HD suffered the damage and not your main drive.
As indicated by the Hatter, if you've got damage to the SATA, it may mean your best chance is to connect it externally. That way you can boot, thereafter connect and diagnose.

How to change desktop background in AppleScript in 10.7?

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Actually, “repeat with k from 18 to (18 + N - 1)” was not a good idea, since it works only with N < 5, as I discovered after posting the script.
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How to block changes of desktop background image

I manage a 30-computer Mac lab in a public high school and I would like to prevent users from changing the desktop background image.
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Blocking System Preferences is easily done through Parental Controls.
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You can imagine the kinds of images that end up as desktop backgrounds in a high school computer lab.

You might try going to System Preferences > Keyboard > Keyboard Shortcuts. In the left pane select Services, then uncheck the item "Set Desktop Picture" under Pictures in the right pane. Once that's done, block that prefs pane.

8800, battery symbol with red line through it. Won't boot. Please help!!!

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Solved!
Go to Solution.

Leave the device to charge 2-3 hours, and then, still connected to the USB cable, remove the the battery from the device a few seconds and reinsert it. If it boots--leave it to charge to 100% (check Options > Status for the percentage).
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When trying up date adobe flash player from 10.1.102.64 to new version 10.2.152.26 i get an error message, "Installer will automatically continue when those conflicting applications are closed: [circle w/line through it] Mozilla firefox."

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Save the Flash installer to the desktop and close Firefox via File > Exit Firefox.<br />
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Can't move files - white circle with white line through it?

OsX 10:4:10
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Network awaiting news footage. I'm stuck. What might this be?
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Hi megagram & dreed2,
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Is there an ARD command or Unix command that I can send to reset the desktop background image to default?

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How do I disable "Set as Desktop Background" as an option in Firefox 3.6 running on Mac OSX 10.5?

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Thanks in advance for all the helps.

Hmm, dunno what to tell you then. I've got an older Mini running headless and have controlled it with Chicken of the VNC and with Leopard's screen sharing. Both work fine (though I've never tried iTunes' cover flow with it... it's not a media server, it's being run as a calendar and FileMaker server). So I suspect you may have some odd, subtle system problem.

When viewing some websites my desktop background image shows as the page background...why...and how do I fix this?

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I thought I had it disabled. I enabled aero and then disabled to be sure, and still have the problem, but that was a very good idea. Thanks.
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Line Through Desktop Background

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