My screen on the imac starts to load then goes to black screen when turned on

how do I reboot my desktop as when it turns on it starts to load then it goes to a black screen

I had the same issue with my 2008 iMac and Apple support walked me through a fix ...
1. Shut the computer down by holding the power button for 10 seconds
2. Restart the computer and press shift at the same time until you see the progress bar start moving
3. Once you reach the point where your screen goes dark and you see the cursor, type the first letter of the username for your computer, then hit Enter, then type your password, then hit Enter.
4. After a moment, you should see the spinning beach ball
5. Your screen should then move on to something along the lines of "Completing OSX Installation" (I can't remember the exact wording). Let it finish. After that it should go to your normal desktop and the issue should be fixed. (If your screen goes pitch black during this process, hit the space bar. I thought it wasn't working, but the screen was just sleeping).
Apparently it's an issue with an automatic update that never quite got past the login screen.
If this doesn't help then try reinstalling whatever version of OS X you are using.

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After shutdown I have to log in twice. The first time it starts to load, then goes black, then gives me login page again. Do you think I have a virus? Or is this Yosemite bug?

Just updated to Yosemite on my MBP. After shutdown now when I login, it starts the process (the bar starts to move), then the screen goes black, then it asks me to login again and this time it is a successful startup. Is this a Yosemite bug or do I have a virus? I also have some funny tiling on the screen at youtube and some other websites. Another bug?

Reinstalling OS X Without Erasing the Drive
Boot to the Recovery HD: Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears. Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.
Repair the Hard Drive and Permissions: Upon startup select Disk Utility from the main menu. Repair the Hard Drive and Permissions as follows.
When the recovery menu appears select Disk Utility. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the main menu.
Reinstall OS X: Select Reinstall OS X and click on the Continue button.
Note: You will need an active Internet connection. I suggest using Ethernet if possible because it is three times faster than wireless.
Also see:
Reinstall OS X Without Erasing the Drive
OS X Yosemite- Reinstall OS X
OS X Mavericks- Reinstall OS X
OS X Mountain Lion- Reinstall OS X
OS X Lion- Reinstall Mac OS X
Note: You will need an active Internet connection. I suggest using Ethernet
if possible because it is three times faster than wireless.

IMac G5 boots, and then goes to black screen

This is not my iMac, but a friend who is using this that she got from here son who upgraded to an Intel iMac. The hardware is a G5 20 iMac. I don't have any more information since it wont power on....or have the installation disks...
The symptoms are that the machine will power on, "bong" show the blue apple screen, then the spinning lines and then suddenly a black screen and nothing more. I booted to single user via Command-S and ran fsck to ensure the disk was clean. Ir reported no errors, but halfway through the check the fans came on full. Only having experienced an Inetl iMac's fans, they were very load. When the fsck finished (with no errors) the fans turned off again. When i exitied the shell to reboot, the same thing happened again. Black screen and not repsonse.
The fact that I can get to single user shell and check the disks points to most of it working, but I'm confused as to why it gets no further.
ANy help would be appreciated as she want to migrate from her current PC based workflow to a more reliable(!) one, but this isn't helping....
Thanks,
Jimmy

Thanks to the responders for their input. I was fearing the worst. However, it looks like the issue wasn't as serious as a broken capacitor. I don't understand why the following worked, as it's not as if the machine was always not working, but just started.
As part of the diagnostic process, the back was opened and then the memory reseated. After reboot this still failed. Then Command Option O F to get into open firmware and then
reset-nvram
set-defaults
reset-all
and the machine rebooted and came up again.
So far there have been no problems, but it looks like this was the fix.

Some web pages start to load then just "blank out"

When I go to some of the www.foxnews.com articles/web pages, the pages starts to load, then blinks, and starts to load again then goes blank. I went to the Actions window on the top most menu bar and saw that this is the last thing loaded. So I am guessing that the last thing shown as being loaded is causing the page to go blank. Any ideas as to why this is happening? I have updated both flash and shockwave players to the newest version. All Apple software is up to date.
-Apple //GS
PS: here is an example of what is loaded when the page goes blank.
http://www.foxnews.com/projects/pointroll/index.html?pid=606048U3092008042516071 4&redir=http://ad.doubleclick.net/click%3Bh=v8/36c1/3/0/*/d%3B202199158%3B0-0%3B 0%3B26605397%3B2321-160/600%3B26315705/26333559/1%3B%3B~okv=%3Bcomp=%3Bptype=sto ry%3Bpageid=370066%3Bcol=%3Bkw=ahmadinejad%20israel%20dying%3Bs1=world%3Bs2=null %3Bpos=frame1%3Burl=story0_2933_355599_00%3Bfnc=ad%3Bsz=300x250%3Btile=2%3B~aopt=0/ff/ff/ff%3B~fdr=202256 043%3B0-0%3B1%3B22018499%3B4307-300/250%3B26360965/26378819/1%3B%3B~okv=%3Bcomp= %3Bptype=story%3Bpageid=370066%3Bcol=%3Bkw=ahmadinejad%20israel%20dying%3Bs1=wor ld%3Bs2=null%3Bpos=frame1%3Burl=story_0_2933_35559900%3Bfnc=ad%3Bsz=300x250%3Btile=2%3B~aopt=2/0/ff/0%3B~sscs=%3F$CTURL$&flash=9&se rver=portalserve&bu=289126824
AND here is what is should be:
http://www.foxnews.com/story/0,2933,355599,00.html
I got this shorter version by stopping the "reload" before it started.

Okay, a guess...
The page only contains some JavaScript.
I don't think the page is meant for people to view - here's the code from the page...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<title>FOXNews.com</title>
<script language="JavaScript">if(typeof(parent.prInst)=='undefined'){var prInst=1}else{prInst=parent.prInst+1} for(i=0;i<parent.frames.length;i+){if(parent.frames.title=='prif'){prInst+}}this.title='prif';var prs="http://ads.PointRoll.com/PRServe/?pos=s&num="prInst+"&"location.search.substring(1)"&r="+Math.random();document.write('<scr''ipt language="JavaScript" src="'prs+'"></scr''ipt>');</script>
</head>
<body>
</body>
</html>
Tom

When attempting to access a specific web page on my iPad, the page seems to load then quickly disappears (resembling a white/black we page). Other sites seem fine. Note this is also occurring when I use Chrome (to access the same page).

When attempting to access a specific web site on my iPad http://www.sggplastering.co.uk the page seems to load then quickly disappears (resembling a white web page). Other sites seem fine.

Thanks so much for addressing my question. Note that the site (www.xula.edu) was working with Safari this morning, but not this afternoon. I also have now been able to access it with Chrome (remember I could not access the site with Chrome initially). Essentially one time while the site was loading on Chrome I clicked another link on the site and opened a new tab for the link- the original page then loaded and now continues to load. I've been trying to do the same with Safari but the page loads and "goes to white" to quickly.
Other notes: I've powered off my iPad (did not help) and restarted my iPad (also did not help). I can also access all other links (to other www.xula.edu related pages on the site using Safari - I find them via a google search)- it's just the home page that loads then goes to "white screen" very quickly. Thanks again for your reply - any help/advice provided is greatly appreciated.

I am trying to help a friend who`s imac is giving her trouble. when the user logon is typed the machine begins to load, then in about a minute, kicks back out into the logon screen. ANY insight to her problem will be greatly appreicated?

I am trying to help a friend who`s imac is giving her trouble. when the user logon is typed the machine begins to load, then in about a minute, kicks back out into the logon screen. ANY insight to her problem will be greatly appreicated?

Start up in Safe Mode.
http://support.apple.com/kb/PH11212?viewlocale=en_US
Repair Disk
Steps 2 through 8
http://support.apple.com/kb/PH5836
http://support.apple.com/kb/ts1417

Have new iMac with iPhoto sharing turned on. When the shared library is clicked the library disappears or starts to load then disappears? What is wrong?

Have new iMac with iPhoto sharing turned on. When the shared library is clicked the library disappears or starts to load then disappears? What is wrong?

Try this: launch iPhoto with the Option key held down and create a new, test library. Import some photos and check to see if the same problem persists. If it doesn't then your current library is damaged and needs repair.
Therefore make a temporary, backup copy (select the library and type Command+D) and apply the two fixes below in order as needed:
Fix #1
Launch iPhoto with the Command+Option keys held down and rebuild the library.
Since only one option can be run at a time start with Option #1, followed by #3 and then #4 as needed.
Fix #2
Using iPhoto Library Manager to Rebuild Your iPhoto Library
Download iPhoto Library Manager and launch.
Click on the Add Library button, navigate to your Home/Pictures folder and select your iPhoto Library folder.
Now that the library is listed in the left hand pane of iPLM, click on your library and go to the File ➙ Rebuild Library menu option
In the next window name the new library and select the location you want it to be placed.
Click on the Create button.
Note: This creates a new library based on the LIbraryData.xml file in the library and will recover Events, Albums, keywords, titles and comments but not books, calendars or slideshows. The original library will be left untouched for further attempts at fixing the problem or in case the rebuilt library is not satisfactory.
If you experience the same problem with the test library then try this basic fix a try: make a temporary, backup copy (if you don't already have a backup copy) of the library and try the following:
1 - delete the iPhoto preference file, com.apple.iPhoto.plist, that resides in your
User/Home()/Library/ Preferences folder.
2 - delete iPhoto's cache file, Cache.db, that is located in your
User/Home()/Library/Caches/com.apple.iPhoto folder.
Click to view full size
3 - launch iPhoto and try again.
NOTE: If you're moved your library from its default location in your Home/Pictures folder you will have to point iPhoto to its new location when you next open iPhoto by holding down the Option key when launching iPhoto. You'll also have to reset the iPhoto's various preferences.
NOTE 2: In Lion and Mountain Lion the Library folder is now invisible. To make it permanently visible enter the following in the Terminal application window: chflags nohidden ~/Library and hit the Enter button - 10.7: Un-hide the User Library folder.
If that fails a reinstall of iPhoto is indicated. To do so you'll have to delete the current application and all files with "iPhoto" in the file name with either a .PKG or .BOM extension that reside in the HD/Library/Receipts folder and from the /var/db/receipts/ folder,
Click to view full size
Then install iPhoto from the source it came on originally.
OT

I start to open an app and it opens and starts to load then flashes back to the home screen this is doing it on all games but not the mail.

I start to open an app and it opens and starts to load then flashes back to the home screen (desk top)

Hello jerrysgirl777
For issues with apps closing on you at start up, try closing the app from multitasking, restarting your device, checking for updates or just deleting the app and downloading it again. Check out the article blow for more information.
iOS: An app you installed unexpectedly quits, stops responding, or won’t open
http://support.apple.com/kb/TS1702
Regards,
-Norm G.

I cannot access my apps through wifi or data usage.After tapping the screen it will start to load then stops.

I cannot access my apps (candy crush or fb) through wifi or data useage. It will start to load then returns back to the home screen.

Answered in your other thread - you only need to post once.

I am running Windows 7 64 bit and can't get the store to load. It starts to load, then stops?

I am having real problems with itunes. I have loaded the latest version of itunes on my windows 7 64bit computer. When I try to connect with the store, it starts to load, then stops! What am I doing wrong?

Close your iTunes,
Go to command Prompt -
(Win 7/Vista) - START/ALL PROGRAMS/ACCESSORIES, right mouse click "Command Prompt", choose "Run as Administrator".
(Win XP SP2 & above) - START/ALL PROGRAMS/ACCESSORIES/Command Prompt
In the "Command Prompt" screen, type in
netsh winsock reset
Hit "ENTER" key
Restart your computer.
Now launch your iTunes and see if it is working now.

Last week I've install Mac OS X Mountain Lion and then after the installation finish my IMAC start up in verbose mode. How can I turn off this mode and start my IMAC normally. I've try to key in the code "sudo nvram boot-args=" in terminal also.

Last week I've install Mac OS X Mountain Lion and then after the installation finish my IMAC start up in verbose mode. How can I turn off this mode and start my IMAC normally. I've try to key in the code "sudo nvram boot-args=" in terminal also.
Thank you for all of your answer.

I've seen it mentioned on here that a PRAM reset may solve it:
Reset PRAM
Shut down the computer.
Locate the following keys on the keyboard: Command, Option, P and R.
You will need to hold these keys down simultaneously in step 4.
Turn on the computer.
Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
Hold the keys down until the computer restarts and you hear the startup sound for the second time.
Release the keys.

My iMac starts up and then shuts itself down during the boot up process. it shuys down half way through the Apple logo appearing. any ideas how to fix?

My iMac starts up and then shuts itself down during the boot up process. it shuys down half way through the Apple logo appearing. any ideas how to fix?

Hi daveormond,
I'm sorry to hear you are having these issues with your iMac. If you continue to have issues with your Mac shutting down part way through the boot up process, you may find the troubleshooting steps outlined in the following articles helpful (given your description, it sounds like it could be either issue, or a combination of both):
Mac OS X: Gray screen appears during startup - Apple Support
OS X: When your computer spontaneously restarts or displays "Your computer restarted because of a problem." - Apple Support
Regards,
- Brenden

How can I fix my App Store on my iPod. When I go to the App Store and click on updates then click on purchased it won't load up the purchased apps. It says its loading then it flashes black and goes to my home screen. How can I fix it

My iPod has a glitch in the App Store. When I go to the App Store and click on updates then click on purchased it won't load up my purchased apps it says it is loading then it flashes black and goes to my home screen. How can I fix it??

Have you udated to iOS 6.0.1?
Otherwise
Try:
- Reset the iOS device. Nothing will be lost
Reset iOS device: Hold down the On/Off button and the Home button at the same time for at
least ten seconds, until the Apple logo appears.
- Reset all settings
Go to Settings > General > Reset and tap Reset All Settings.
All your preferences and settings are reset. Information (such as contacts and calendars) and media (such as songs and videos) aren’t affected.
- Restore from backup. See:
iOS: How to back up
- Restore to factory settings/new iOS device.

HT4743 I downloaded a tv episode. When I press play it starts to load then immediately goes back to the episode page. I've tried rebooting my ipad but that doesn't help. I can't get into my account info from my ipad as suggested.

I recently purchased a tv episode from ITunes. It shows that it has downloaded. When I press play it starts to load then immediately returns to the episode page. I have tried rebooting several times.

Basics from the manual are restrt, reset, restore.
Have you tried each of these?

HT201272 insalled tap pet hotel it half loads then goes straight back to the home screen can any body help

can anyone help my daughter downloaded and installed tap pet hotel it half loads then goes straight back to the home screen.

Thanks for your thorough post. I too need to use BTMM on almost a daily basis for my job, and it has fallen short countlness times. I too have taken great pains to check all of the typical trouble shooting steps within iCloud and in the Apple keychain on each Mac etc, but after the latest rounds of system updates from Apple a few weeks ago to Mountain Lion, BTMM on one of my Macs is completely broken and unusable. I would concur that if you need remote access for "real" mission critical use, just bite the bullet and pay for a service like LogMeIn. You won't regret it and you will get real software support.

My screen on the imac starts to load then goes to black screen when turned on

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