Slow start up sometimes stuck on blue screen

since i got the problem with bootcamp which i cant use it anymore for some reason my imac start up or bootup become so slow sometimes i got stuck to the blue screen i did the hardware test and it says fine no problem at all do u think is it a software problem do i need to a clean install for my mac os x ?
and this is my spec
Model introduced: 2009
Serial number: **
Production year: 2010
Production week: 21 (May)
Production number: 31495 (within this week)
Name: iMac Intel (late 2009)
ModelCode: imac_late_09
Model Number: MB950
Group1: iMac
Group2: Intel
Generation: 7
Machine Model: iMac10,1
CPU speed: 3.06GHz
Family name: A1311
Screen size: 21 inch
Screen resolution: 1920x1080 pixels
Colour: Aluminium
Memory - flavour: DDR3-S-1066
Memory - number of slots: 4
Memory - maximum total: 16GB
Memory - largest module: 4GB

One way to test is to Safe Boot from the HD, (holding Shift key down at bootup), run Disk Utility in Applications>Utilities, then highlight your drive, click on Repair Permissions, Test for problem in Safe Mode...
PS. Safe boot may stay on the gray radian for a long time, let it go, it's trying to repair the Hard Drive
Reboot, test again.
If it only does it in Regular Boot, then it could be some hardware problem like Video card, (Quartz is turned off in Safe Mode), or Airport, or some USB or Firewire device, or 3rd party add-on, Check System Preferences>Accounts>Login Items window to see if it or something relevant is listed.
Check the System Preferences>Other Row, for 3rd party Pref Panes.
Also look in these if they exist, some are invisible...
/private/var/run/StartupItems
/Library/StartupItems
/System/Library/StartupItems
/System/Library/LaunchDaemons
/Library/LaunchDaemons

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G4 start up problem, stuck in blue screen

Hello all. So, after mistakenly unplugging the G4 it will no longer boot. I get the gray screen, which then goes to the blue screen where it stays. The mouse pointer will appear, then periodically disappear while a status icon flashes in the lower center of the screen.
I've already tried resetting the PMU. When I attempt to use safe boot i get to the login screen. I enter my login/pass, which brings up a black prompt screen asking for login/pass again. I can login, but what if anything am I supposed to do at this point?
I thought safe boot just launched OSX without some features enabled?
Any suggestions. Tonight I'm going to try to use my laptop to open the G4 in target mode.
Thanks,
D

You could try the following. From the hatter. It was for a abit different problems, but may work.
Unplug the machine, pull the clock battery, hit the power button to discharge. Then plug it in without the clock battery. The machine should boot perfectly. Shut down, reinstall the clock battery, and now the system is fully functional. From Macosxhints.
To help you understand Safe Mode check the following:
http://docs.info.apple.com/article.html?artnum=107392
Also when you login with Safe Mode, go into system preferences/accounts/Login items, and remove any that are there.
Then restart without holding any keys.
The problems could be a third party application at login that would allow the boot.
If the problems continues, and there are any files she needs, I would start again in Target mode, pull the files. Than do a complete reinstall, with a zeroing of the hard drive which will take a while depending on its size.

Installed Safari 4 beta, now start up is stuck at blue screen with pinwheel

I reset PRAM and did fsck.
I don't have the original install disks to do any disk utility or even archive and install. Is there a way to get a copy of an install disk that will work? I was working with Tiger before, can I just go buy Leopard and do an archive and install or do I need the original one? Any help?
O yea, I can't do safe mode because I've been pressing shift when it starts and it doesn't change anything. Is there any other way to boot into safe mode, like doing it from the command line or something?
Message was edited by: ericka0728

You can try the methods described in this article
http://support.apple.com/kb/TS1417
Your profile says iMac G5, so you should be able to run Leopard. You do not have to install the original system first. An +Archive and Install+ is a good way to do the upgrade from Tiger to Leopard. However, if the volume has a disk directory (or other data corruption) error, you should resolve it before doing a major upgrade (or anything where a lot of new files are written to the volume).
If you contact Apple, you may be able to get a replacement disc for the one that came with your iMac model.
Do you have an external drive to which you can back up your current startup volume? It may have a startup problem, but it is probably still accessible, if you start up from another system on another volume.

Hi, Hi, Hi I have the old MacBook Pro. Upgraded to Mountain Lion which completely wrecked the system. So downgraded to Snow Leopard. The updated the combo update. Now stuck on blue screen at start-up. Need help. Greatly appreciated. Thank you.

Hi,
I have the old MacBook Pro. Upgraded to Mountain Lion which completely wrecked the system. So downgraded to Snow Leopard.
Then updated the combo update. Now stuck on blue screen at start-up.
Need help. Greatly appreciated. Thank you.

Downgrade Lion/Mountain Lion to Snow Leopard
1. Boot from your Snow Leopard Installer Disc. After the installer
      loads select your language and click on the Continue
      button. When the menu bar appears select Disk Utility from the
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2. After DU loads select your hard drive (this is the entry with the
      mfgr.'s ID and size) from the left side list. Note the SMART status
      of the drive in DU's status area. If it does not say "Verified" then
      the drive is failing or has failed and will need replacing. SMART
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3. Under the Volume Scheme heading set the number of partitions
      from the drop down menu to one. Set the format type to Mac OS
      Extended (Journaled.) Click on the Options button, set the
      partition scheme to GUID then click on the OK button. Click on
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4. Quit DU and return to the installer. Install Snow Leopard.
This will erase the whole drive so be sure to backup your files if you don't have a backup already. If you have performed a TM backup using Lion be aware that you cannot restore from that backup in Snow Leopard (see below.) I suggest you make a separate backup using Carbon Copy Cloner.
If you have Snow Leopard Time Machine backups, do a full system restore per #14 in Time Machine - Frequently Asked Questions. If you have subsequent backups from Lion, you can restore newer items selectively, via the "Star Wars" display, per #15 there, but be careful; some Snow Leopard apps may not work with the Lion files.

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IMAC intel A1208 is stuck on blue screen after start-up. How can this condition be resolved?

Please carefully read Apple's Gray screen appears during startup

MacBook won't start, stuck on blue screen

My MacBook is stuck on blue screen... forever....
MacBook info:
13.3in, 2.0GHz Intel Core2 Duo, 120GB HD, 2X1GB RAM with Leopard
MacBook was running great until last night... My screen got frozen while browsing, and force quit did not work. So I used power button to turned it off. After that, my MacBook won't boot up anymore... gray screen for about 3min, apple icon screen for 15min, then stuck on blue screen.
I think I've tried everything in here..
http://support.apple.com/kb/TS2570
The only command that I was able to use was "Reset the NVRAM / PRAM", but no change there...
I tried install DVD (came with the MacBook), but I cannot boot with DVD with C button and now the install DVD is stuck....
Is there any way to fix this? My warranty expired already, and I am trying to do everything before taking this to the store...
Thank you.

Thanks Eric.
I have tried that before, but I gave an another try. I held the option button longer this time, until I saw the apple icon. Then cd (DVD?) image came on, so I clicked on it. But after apple icon went away (10 min?), my macbook is again stuck on blue screen. I only saw cd image, and did not see any other drives... Is that a bad sign?
Thanks,
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GE60 0NC-622UK laptop is stuck on Blue Screen can't login! please help..

Had this laptop for just one month, before it's all good. Windows 8 64bit.
In last two days, the mouse and touchpad became dysfunctional occasionally, able to move the pointer but just could't click on anything regardless of left or right, e.g. choose or open new. It would be working after logoff/relogin and reboot, but same problem still came up randomly.
Last night, I did the same thing to reboot the laptop after had the pointer dysfunction, but then it displayed a blue screen before the login with a error called 'System Thread Exception Not Handled', and then just stayed on this page would't reboot automatically (waited for 30 mins), so it left me no choice to shut it down by pressing power on/off button manually, afterwards with couple of times rebooting, it just kept going into this same blue screen and could't get into the system...Sometimes it would automatically start diagnosing before blue screen, ask me to restore or repair, but none of them fixed the problem, repeatedly stuck on blue screen every time...
And I don't have any windows 8 dvd, delivered box only has one for drivers and manual book.. so boot from dvd is not possible..
p.s. sorry about my english if caused confusion
thanks..

Quote from: Neoistheone2000 on 06-June-13, 00:26:05
Try starting Windows 8 in Safe Mode, its kinda difficult in Windows 8 to do you have to be very precise when doing it, right as the system boots you need to start spamming F8 sometimes you have to do Shift+F8.
You may want to disable fast boot in the BIOS so you have some time to get ready to hit the buttons, once you get the boot menu up try Start Up Repair first and see if it fixes anything then try booting, if noting then try safe mode and un-do anything you have done to the system recently.
Let me know how this goes.
Really appreciated your help!
I get into troubleshooting page by pressing F3 when laptop was booting up, and changed start up with Safe mode which works..I've done many things in Safe mode, like updated drivers, run anti-virus program, deleted recent installed software, and then somehow the blue screen error was gone after reboot...It seems one of them must be the cause for that problem.
Anyway, my laptop is working properly now, thanks a lot, if error happens again in future i might still need some help

10.6.8 update stuck on blue screen... 4 hours and counting

Upon selecting automatic software update my system seems stuck on blue screen with spinning grey gear. How long should I tolerate this (going on 4 hours now) before attempting to do something?
I can access the hard drive of this computer from others on my local network and am able to copy files from it. I'm wondering if I should try to grab all that is valuable to me before anything worse happens.
Advise?

If your data is not backed up copy any important documents you can from your Mac's startup drive.
Once you are done copying your data, use the power switch to turn off your Mac and disconnect everything except a wired keyboard/mouse and monitor. Start up in safe mode by holding the shift key down right after you hear the startup chime. Keep holding down the shift key until you see the Apple Logo and spinning gear.
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OS X: What is Safe Boot, Safe Mode?
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10.5.3 won't install... stuck in blue screen loop

I chose to install it from software update. It told me to restart. I did.
I got hung up on a blue screen loop.
But no error messages or anything.
I had to hard reset.
Then started up fine- but system profiler shows I'm still 10.5.2.
And software update still shows the update as "downloaded".
If I click "install" it immediately asks me to reboot, and sticks in the blue screen loop again.
I have done this three times now.
If I choose restart from the apple menu- same thing.
So I decided to shut down- can't shut down. Get stuck in the looping blue screen.
So it seems like something is gumming up the shut down process. I've heard of startup items making things freeze- can the same thing happen when shutting down?
Not sure what the issue is.
The other people posting problems seem to be getting error messages, etc.
I am going to try to repair permissions, and if that doesn't work maybe I'll try the standalone installer- but why is this happening? this is like a 2 week old MBA with next-to-no third party stuff installed on it... what could be corrupted already?
fortunately I have backups if worse comes to worse...
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Thanks!

Alexroet wrote:
should i try the standalone installer?
You could try, it's been known to sort system issues because it's fuller than the incremental "delta" update, so it should overwrite any files that are damaged or missing.
Remember to Verify Disk before update and repair permissions after update from /Applications/Utilities/Disk Utility.
But if you can't boot into Safe Mode something is amiss*. Since, you are able to use your system (not stuck on blue screen, try this first:
Go to System Preferences >> Accounts >> Login Items and remove them. Boot normally and test. If not go to ~(yourHome)/Library/Contextual Menu Items and move whatever is there to the desktop. Then do the same with /Library/Contextual Menu Items. Lastly, try moving ~(yourHome)/Library/Fonts to your desktop and restarting.
*EDIT: You do have to hold the shift key for Safe Boot until you see the spinning gear, just in case you didn't do that.
-mj
Message was edited by: macjack

Imac 8,1 does not boot stuck on blue screen

imac8,1 mid (2008) 20" stuck on blue screen after boot ,It starts in safemode, below is a list of thing i have check so far
1 Apple hardware test (says every thing is ok)
2 Disk utility repair (was successfull)
3 reset PRAM ,SMC
3 Boot for OSX dvd and reinstalled (still only starts in safe mode )
4 boot in single user mode and used fsck ( said every thing was ok)
Yet when i boot i get stuck on a grey/blue screen . it starts in safe mode though, Is there some EFI , firmware restore file that i can install ???
What else can it try????

Please closely follow Apple's advice in Gray screen appears during startup. There are a number of steps to take, be methodical and follow the directions closely.

Stuck at blue screen

It will load up after restart, passing the grey apple logo. When it looks like it's about to finish loading up Mac OSX it gets stuck at blue screen. Tried using Diskwarrior on it but it gets stuck in repair.

First thing to do in this situation is load the MacOS install disk, and reboot the system holding the C key down when you hear the chime until MacOS shows it is loading. This will not on;y show whether the system is basically sound and capable of booting, but also then give you the opportunity to run Disk Utility (in the Utilities menu of the installer) to check the hard drive for errors, and if any are found, attempt to repair them.
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When Disk Utility had finished the Repair Disk task, it if shows no faults, then you have a MacOS problem and likely need to perform an archive and install to set up a new copy of MacOS while preserving your files and applications. If Disk Utility shows errors it cannot repair, particularly reporting 'error on exit', it generally means the drive has suffered a problem. In those situations DiskWarrior is sometimes successful at recovery, though often a reformat is needed. In a small proportion of cases this problem is indicative of hardware failure - usually the hard drive itself, in which case a reformat would generally be expected to fail.
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G5 stuck on blue screen at set up point?

I've read other listings and they all have tried everything they know. I know nothing except to turn the computer on and off. Last night it worked then this morning it is jusst stuck at this start up point. I held in the button and turned it off and on again, got stuck at blue screen point again. I unplugged everything and still stuck? Please advise as I just spent hundreds adding this G5 to our system of g4's throughout the house and are looking forward to using it.
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Have you tried starting from your install disc and using Disk Utility?
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2. When your computer finishes starting up from the disc, choose Disk Utility from the Installer menu. (In Mac OS X 10.4 or later, you must select your language first.)
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Try to contact an ASP in your country and ask for the further handling!
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