Blue screen at start up...can't start up in OS x 10.1.5

When I shut down yesterday and tried to start up my computer later, the computer went through the initial opening stages but when it got past the gray screen with the little computer icon and went to the blue screen with the white mac os x box that should have a progress bar showing the start up process, there was no progress bar and then the white box disappeared and the spinning pinwheel appeared and nothing happened after that -- just spinning and spinning. I have run disk utility and no hardware problems noted. I can start up in classic (OS 9) and can see all my files on the harddrive. I have used the install CD for os X but when I tried to restart the computer again, the same sequence happened as earlier. Do I need to erase everything and run the software restore CD's? Thanks for any info.
iMac G4 Mac OS X (10.1.x)

I did refer to this (See quoted reference below) page. Question...how do I know which is the mac ox 9 system folder versus the mac OX x system folder. I have 2 system folders with library in them and with font folders in those. They are both on the same original folder file list of the HD.
Start up from your Mac OS 9 System Folder or a Mac OS 9 CD-ROM disc. If your computer only starts from Mac OS X, start up in Safe Mode.
Drag the Fonts folder from the Mac OS 9 System Folder (not the Mac OS X System folder) to the desktop.
Restart the computer in Mac OS X.

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Can't get past the blue screen with "starting Mac OS X"

I am having problems with starting my iMac. It gets to the blue screen with "starting Mac OS X" but won't go beyond that point. I was able to get the disc drive open with the help of other posts, holding down the mouse while turning on the computer, but the drive won't stay closed with the install disc in it. I have even tried holding down the "c" key while restarting the computer and it wouldn't work. Any help would be greatly appreciated. So much info that I could really use. Also, please keep in mind that I am not too computer savy. Simple language please.
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If the steps I provided in my earlier post are not helping, then I see your options at this point as follows:
1. Run the Apple Hardware Test (AHT) that came the affected computer. See my "Apple Hardware Test" FAQ for comprehensive advice on using the AHT in troubleshooting.
2. Performing an Archive and Install. For important tips on this, see my "General advice on performing an Archive and Install" FAQ. Perform the steps therein in the specified order.
3. Take the computer in for service. If there is an Apple Retail Store in your area, I'd recommend taking it there. You may wish to call ahead to make an appointment at the Genius Bar.
Good luck!
Dr. Smoke
Author: Troubleshooting Mac® OS X
Note: The information provided in the link(s) above is freely available. However, because I own The X Lab™, a commercial Web site to which some of these links point, the Apple Discussions Terms of Use require I include the following disclosure statement with this post:
I may receive some form of compensation, financial or otherwise, from my recommendation or link.

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My Macbook has been working just fine for a while, but recently today, it just started crashing on me a lot. This is NOT a kernel panic, but the screen suddenly goes blue and hangs. Then I am forced to restart it.
When I restart it normally, it stops going on the gray screen. I try Safe Mode, but it then suddenly goes to said blue screen again.
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Bump. Really need help on this.

Blue screen on start up

This is a late 2008 macbook pro i finally got it to respond to me pushing buttons so now that i got it to turn on using taking the battery out then pressing the start button for 10 seconds then putting in the plug it turned on...now i am stuck on this blue screen and if anyone can help me resolve this issue i will gladly appreciate it.

rdeguzz3 wrote:
hey tjk
i dont have any of the discs my ex girlfriend doesn't remember where she put it for crying out loud. i have had my mbp for almost 4 years and I dont want to give up on her even though i have 2 new ones. The first one will always have sentimental value for me and also many of my important documents are in the hdd. is there any way i can resolve this without the discs and how do i go on safe mode? the only thing i get is the blue screen no turning wheel i don't even see the mouse cursor so for the life of me i have been frustrated the past rthree days since she was in her coma state...so tjk anything please i would appreciate and if you can step by step procedures if possible
thanks
robert
The gf thing sounds like selective memory, but that's another story.
Immediately after you hear the startup tone, hold the Shift key. The Shift key should be held as soon as possible after the startup tone but not before.
Release the Shift key when you see the gray Apple icon and the progress indicator (looks like a spinning gear).
http://support.apple.com/kb/HT1455
http://support.apple.com/kb/HT1564

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I got the old stuck on blue screen at start up ,
would only boot in safe mode , after two afternoons of RAM test , repairing disk permissions , hrdware tests , zapping PRam and the likes to no avail , I finally resolved the problem thanks to a tip from this forum:
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is it the card itself ? (everything looks normal) or should I go for an archive and install ?
any input would be great,
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Hi-
Jean Baptiste mentioned that he removed extensions for the drivers.
Removing a conflicting driver is fine as long as the driver specific for the card installed remains.
In this case, I think it may have been a corrupt driver, rather than a conflicting driver.
Radeon drivers in OS X have a good track record of compatibility, and such driver conflict is not a historically common occurrence.
Hard drive maintenance with Disk Warrior is the best way to correct corrupt files, unless bad RAM is corrupting the files.....
In your case, it shouldn't hurt anything to remove the Radeon 8500 drivers.
Could it be the driver extensions that are preventing a proper boot. The monitor displays perfectly in safe mode so I don't understand why it would be the video card.
Booting to Safe mode unloads drivers. Only very basic core graphics rendering drivers are loaded.
No Quartz/Quartz Extreme, no Core Image, no 3D acceleration, etc.
This doesn't tax a graphics card.
Failure to boot, or failure of graphics when drivers are loaded are due to one of two things- corrupt drivers or failing components on the graphics card.
A reinstall of the OS can rule out the first.
Installing a different graphics card is the only way to rule out the second.
Before buying a new card, I would try a fresh OS.
Installing a new OS on a separate drive, and booting to that is an easy way to test.

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.
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Need help. Greatly appreciated. Thank you.

Downgrade Lion/Mountain Lion to Snow Leopard
1. Boot from your Snow Leopard Installer Disc. After the installer
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2. After DU loads select your hard drive (this is the entry with the
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3. Under the Volume Scheme heading set the number of partitions
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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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http://support.apple.com/kb/TS1545?viewlocale=en_US
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Scott

Scott,
Ok here are the next things on my list, and I will start with what I think is the most valuable to the just plain fun and simple you and I would be shocked if it fixed it. I only skimmed your other post, if you feel that something I recommend is a repeat you can ignore it and I will not take any offense. Sorry If my post is a little loopy I've been up for way to long.
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http://support.apple.com/kb/HT1564
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Resetting PRAM and NVRAM
1. Shut down the computer.
2. Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.
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http://support.apple.com/kb/HT1379
3) Reset the startup Disk. Open System Preferences -> Startup Disk -> Select Mac OS X.
I'll leave you with that, please come back with your results.
Weston

Help Blue screen on start up

Hey Guys,
I could use a little help on this one.
Symptoms:
I am only getting a blue screen on start up.
This happened after I downloaded an FLV player.
I think it was called "whimpy flv player."
Might be a coincidence (not sure).
I can start up in safe mode only and can get online hardwired, but the option for wireless is gone.
Any help would be appreciated.
Poncho

First try resetting your PRAM
Then try booting from your install disc and verifying/repairing your hard drive.
Disk Utility
1. Insert the Mac OS X Install disc that came with your computer, then restart the computer while holding the C key.
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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3. Click the First Aid tab.
4. Click the disclosure triangle to the left of the hard drive icon to display the names of your hard disk volumes and partitions.
5. Select your Mac OS X volume.
6. Click Repair. Disk Utility checks and repairs the disk.

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Hold down the power button until your Macintosh shuts off.
Then hold down the power button until the white light on the front of your Macintosh starts flashing rapidly.
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I had this very same problem happen to me a few weeks ago and I was able to solve it by doing those few steps.
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https://discussions.apple.com/docs/DOC-5282
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Blue screen at start up...can't start up in OS x 10.1.5

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