Mac Book will not boot

My macbook, which is only a few months old, downloaded some new updates, and when it was restarting, i closed the screen and set it aside. Since then it will no longer boot. It loads the apple screen, and appears as though it is loading, but it never does. What could this problem be?

Do a power shut down. Hold down power button until it's off. Try to boot from the disk, if it fails try to boot and reset the 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.
Try this next and report back,
Ray

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Replaced Optical Drive now Mac book will not boot up

I bought a second hand Mac Book Pro A1150 model. It did not have an optical drive so I bought one, installed it and now my Mac Book will not boot up. When I take the drive out the Mac Book boots up fine. I was told that the optical drive although used was tested and work when it was shipped out. I'm a little new to Macs but not new to working on computers. Is it common for a possible defective optical drive to casue a Mac Book pr to not boot up or does this sound like an issue with the optical drive cable, or possibly the logic board?

That is true. I cannot think of any way to test the Optical Drive without swapping it into a known correctly operating MBP.
A thought which probably may not be an issue. When I installed an Optical Drive in my old (2006) MBP, I remember seeing in the instruction manual an item called a grounding pad (which looked like a tiny steel brillo pad with out soap) which was missing in mine. The MBP worked and I essentially ignored it. Perhaps that may not be case with your situation.
My thoughts are that the Optical Drive is malfunctioning and the cause of your problem. Perhaps you should consider getting a new replacement from OWC. But that entails a $100 risk with no guarantees of success.
Ciao.

I am in mavericks disk utility recovery mode as my mac book will not boot up & stays only on the grey apple screen. When I verify the disk I get open error5 :input /output error on Syst stuck on 1 minute pouring out over 50 error messages & still counting

I am in Mavericks disk utility recovery mode as my mac book pro will not boot up & stays on the Apple grey screen . When I verify disk permissions I get
Open error 5:"input/ output error" on syst with over 50 of this messages & still counting . Disk Utility says 1 minute
But this has been going on for over 10 mins .
I can not verify disk or repair disk .
I have tried to reinstall mavericks operating system but it says my hard drive is locked which is very strange .
Does anyone know what is going on here ?
My system looks like it has been totally corrupted . Thanks Andrew

Could be. The "lock" isn't actually looking for a password.
WARNING: This will completely erase the ENTIRE hard drive.
What you would need to do is boot to recovery > disk utility > select the MAIN drive on the left side > partition > change partition layout from CURRENT to 1 PARTITION > ensure on the right side it says Format : Mac OSX Extended (Journaled) then push APPLY.
Then if it will allow us, close the windows until you see the 4 options popup again and select "Reinstall Mac OS X" select the Mac HD and you should be good to go!

Mac book will not boot up

macbook pro will not boot up
the screen comes on and the apple symbol appears with the little wheel rotating but then just stays there for hours
Any suggestions?

Try a safe mode start or a recovery start.

Mac book will not boot up,only grey screen with ? on it,Why?

Why won't my Mac book boot up,start up only grey screen with ? showing?

That folder with the question mark icon means that the MacBook can't find the boot directory. That can either mean it can't find the hard drive or the Operating System data on the hard drive is somehow corrupted.
With 10.4, 10.5 or 10.6 put your install DVD into the optical drive (CD/DVD drive) and reboot. Be sure to either use the disc that came with your Mac, or, if you installed a later Mac OS X version from disc, use the newer disc. As soon as you hear the boot chime, hold down the "c" key on your keyboard (or the Option Key until the Install Disk shows up) until the apple shows up. That will force your MacBook to boot from the install DVD in the optical drive.
Or if you are running 10.7 Lion, 10.8 Mountain Lion or 10.9 Mavericks, boot from the recovery partition (Command +R on boot) and use Disk Utility to repair your OS 10.7, 10.8 or 10.9 partition.
When it does start up, you'll see a panel asking you to choose your language. Choose your language and press the Return key on your keyboard once. It will then present you with an Installation window. Completely ignore this window and click on Utilities in the top menu and scroll down to Disk Utility and click it. When it comes up is your Hard Drive in the list on the left?
If it is, then click on the Mac OS partition of your hard drive in the left hand list. Then select the First Aid Tab and run Repair Disk. The Repair Disk button won't be available until you've clicked on the Mac OS partition on your hard drive. If that repairs any problems run it again until the green OK appears and then run Repair Permissions. After repairing use Startup Disk from the same menu to choose your hard drive for restarting from your hard drive.
If your hard drive isn’t recognized in Disk Utility then your hard drive is probably dead.

HT1338 White Mac book will not start up just shows gray screen with apple logo

White Mac book will not boot up gray screen only

There are some recovery steps for this condition outlined in the below article.
Mac OS X: Gray screen appears during startup

2009 Mac Pro will not boot up under Windows

I have an Early 2009 Mac Pro system (Mac Pro 4,1) and I've had this system for 3 years already and have been working under OS X with this system ever since I purchased it.
However, when I tried to boot off my Windows disk, something very interesting happens. The Mac Pro WILL NOT boot up off the Windows disk or a known working Windows partition if two monitors are connected. Upon holding down the option key and selecting the Windows partition, I will get a black screen on one monitor (the one connected via Mini Displayport) and the other screen receives no signal and will enter standby and the system is halted. It does not respond to keystrokes, there is no hard drive activity, no measured power increase on the UPS, no apparent network activity, nothing. The only way to exit this scenario (from what I can tell) is to power off the machine, disconnect the display on DVI, power on the machine again, select the Windows partition wait for the system to reach the login window and reconnect the DVI monitor (at which time Windows recognizes it immediately and the system works fine again).
My question to the community is, does anybody know why this is happening and is there a known fix for this? Quite frankly, having to disconnect a monitor just to restart is very tedious and frustrating.
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If anyone knows of a fix or what to do in this situation, or if you are also having this issue, I would love to hear your input!
Thank you!
For the record, I am running all the latest software builds on the OS X side (10.7.4, not that it would really matter at this point). I have also disconnected all unnecessary equipment in a trial and error scenario but the results are still the same.
The system passes all ASD testing.
The full specification of the computer and all connected equipment are as follows:
2009 Mac Pro (4,1) 8-Core
2x Intel Xeon Nehalem 2.66GHz Quad-Core CPUs
16GB DDR3 ECC 1066MHz RAM (Apple Branded)
Two OWC 120GB SSDs (One for OS X, the other for Windows 7 x64) - These are in place of my optical drives.
4x 2TB WD Black Hard drives for storage.
Two Samsung P2350 Monitors connected via DVI. (One using a Mini Displayport to DVI adapter).

In Windows I am using the latest (12.4) Catalyst Software Suite, 64 bit of course, downloaded directly from AMD's site after installing the drivers from Boot Camp.
As for installing Windows I used an original (not burned) installation media (Disk is in a pristine condition). And yes, Windows is fine, the problem just seems to be getting the system to boot up Windows with that second monitor. However if the "problem monitor" is disconnected the system boots fine 100% of the time and connecting it later after booting the system will still operate properly.
For the sake of arguement I swapped monitor cables and connected the "second" monitor to the mini displayport adapter to verify that it wasn't a cabling issue and I'm still yielding the same issues.
As for GPU testing, I've played games (Crysis, Grand Theft Auto IV, Battlefield 3, etc.) and I've had no issues with the card or stability.
You would think that Apple would try to find a fix for this, especially considering the caliber of this machine.

I'm trying to downgrade my icloud storage; however, my MAC book will not upgrade pass 10.6.8 and I don't have my iphone anymore. If there another way for me to do this?

I'm trying to downgrade my icloud storage; however, my MAC book will not upgrade pass 10.6.8 and I don't have my iphone anymore. If there another way for me to do this? I've tried everything I can find online and of course my coverage has expired and can't call the support team.

Hello Lara,
have you already called Apple and explained your current situation, because I don't see a way to downgrade your storage plan with a Mac only running Snow Leopard and without a iOS device running at least iOS 5.
Best regards.

Hello, mac mini will not boot. I get a file symbol with a question mark, then a white screen, Hello, mac mini will not boot. I get a file symbol with a question mark, then a white screen

Hello, My mac mini will not boot. When I turn it on, I get the chime, then the white screen, then the apple symbol, then a file symbol with a question mark, then the white screen and then it stays like that.
Is this a bad hard drive?

Sounds like it. Try booting from your OSX restore DVDs - startup and hold down "C". This will take AGES! Then run Disk Utility from the menu.
The flashing ? means your system is corrupt, dead, not there, on a dying HD, etc...

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My mac mini will not boot the OS proserly, it goes to a screen that tells me that some root folder can not be found.
The install CD works and I can boot to it. The disk utility reports no problems, all disk repairs done and OK.
The computer still will not boot to the OS.
How can I get the files I need off the drive before I reinstall the OS?
I have other Macs and fire wire cables, cross over cables, regular eithernet cables. What can I do?
Thanks!

How can I get the files I need off the drive before I reinstall the OS?
Connect it to another Mac with a FireWire cable and start it up with the T key held down.
(40535)

My Mac pro will not boot. it gets stuck on the grey screen.

My Mac pro will not boot. it gets stuck on the grey screen. What can I do?

Mac OS X: Gray screen appears during startup
If using 10.7 or later, the Installer/Utilities DVD has been replaced with a special emergency partition on the Hard drive called "Recovery_HD"

HT1366 My Mac book will not turn on

My Mac book will not turn on no matter what I do help

This is might help:
http://www.youtube.com/watch?v=JwCdgwGHFm8
I had given up on finding a solution until i found your video. It's just a miracle!!!
- macbook pro mid 2010
- reason for the problem: i believe because i removed the battery connection from the motherboard without shut down the system.
macbook pro does not work power on

Mac Pro will not boot - HD and Machine are fine.

Greetings, and thank you in advance for your wisdom.
I have a 12-core Mac Pro, and she has been running like a dream. Once a month I run Onyx. Yesterday I did the same and upon reboot I got the grey apple screen and the spinning progress wheel that never stops spinning.
1. I repaired the HD via Disk Utility. All is fine.
2. The contents of the start-up drive are accessible - so the drive itself is not physically damaged.
3. I installed a new HD and made a copy of this Start-up disk via the Disk Utility. It will not boot from this drive as well.
4. I installed Snow Leopard (still using this) on the new drive to make sure the computer was happy. It fires up fine.
5. Everything is disconnected from the Mac Pro
So, I have obvious, and idiotically damaged the start-up disk using Onyx (assumption).
My life would be much better knowing I could do something that would enable me to boot from my current start-up and that's where I seek your wisdom.
Another question would be: If the above is not possible, if I install a fresh OS on the new drive, and then begin to replace all of the folders from the old drive (applications, library, etc.) will I be able to access my files as I did before. My issue is that I use this for music production, and there are literally close to 100 plugins that all have been registered. Going back through that process again would be days of labor, as some of these were purchases years ago. Tracking down serials would be a task. I think you understand.
So any advice that might prevent me from having to do as I said above will be wonderful.
Thank you all so much.
Lance

Under some circumstances, you may need to reinstall Mac OS X. You can reinstall Mac OS X while keeping your files and user settings intact.
from:
Mac OS X 10.6: Reinstalling Mac OS X
If your Hardware is functioning correctly, and your disk has no un-repaired Directory problems [Hint: run Disk Utility ( Repair Disk ) first] then re-installing Mac OS X modifies ONLY the files that are part of Mac OS X. Your Added Applications, User files (which contain preferences and serial numbers) are not supposed to be touched.

Mac Mini will not boot after Security Update 2008-007

Hello,
A G4 Mac Mini machine I was asked to take a look at will not boot after the owner (succesfully) installed Security Update 2008-007 from Software Update. Booting always hangs at the blue screen after the Apple logo, and booting in verbose mode reveals that WindowServer is crashing repeatedly. Permissions and filesystems have been repaired, PRAM reset, etc. Safe boot also exhibits the same problem, but it is possible to boot to single user mode. Hardware checks out fine with diagnostic utilities.
Any suggestions on how to fix this? Unfortunately, backups are not available (it's not my machine =).

Hi Arkku , and a warm welcome to the forums!
I'd certainly give Sig's advice a try first.
If that should fail...
applesetupdone...
This was Posted by: JoseAranda at September 9, 2006 3:48 AM
"OK, restart your computer, hold down Command-s and type in the following:
/sbin/fsck -fy Enter
/sbin/mount -uaw Enter
rm /var/db/.applesetupdone Enter
# The rm command is the remove command which deletes the file.
# Robert: I'd rename the file via: mv /var/db/.applesetupdone /var/db/.applesetupdone.old
reboot Enter
Once you've done that the computer reboots and it's like the first time you used the machine. Your old accounts are all safe. From there you just change all other account passwords in the account preferences!!
end of posted by: JoseAranda"
Reset OS X Password Without an OS X CD...
http://theappleblog.com/2008/06/22/reset-os-x-password-without-an-os-x-cd/

Power mac g5 will not boot to dvd at all any ideas?

Power mac g5 2.3 late 2005. Leopard 10.5 installed on drive and boots ok to hhd.
how ever i need to go back to tiger 10.4.4 or later for my music hardware to work correctly..
Sooo i purchased a Tiger 10.4 black retail disk and it will not boot to it in any way all I end up with is a kernal report screen.
I have tried everything.. taking the drive out. adding a new formatted drive to install to.. no joy..just does not even look to be installing nothing..not even a spinning wheel thingy . if the disk was too early eg before late 2005 would it act like that and not install?
I'm lost here lol.

Hmmm, something else is going on I guess...
The dvd is black with the X on it and has this number on it - 2Z691-5305-A
Apple Mac OS X 10.4 Tiger (Full Install) DVD Retail Version
Item #:
MA453Z/A 1005166
Compatible with eMac (2005), iBook G4 (Late 2004), iBook G4 (Mid 2005), iMac G5 17-inch (ALS), iMac G5 20-inch (ALS), iMac G5 (17-inch iSight), iMac G5 (20-inch iSight), iMac (Early 2006 17-inch), iMac (Early 2006 20-inch), Mac mini, Mac mini (Late 2005), Mac mini (Early 2006), MacBook Pro, Power Mac G5 (Early 2005), Power Mac G5 (Late 2005), PowerBook G4 (15-inch Double-Layer SD), PowerBook G4 (17-inch Double-Layer SD).
Also...
Mac OS X Tiger 10.4 Drop-in Install Hardware Bundle (CDVersion)
Item #:
2Z691-5306-A 1002481
Compatible with eMac (2005), iBook G4 (Late 2004), iBook G4 (Mid 2005), iMac G5 17-inch (ALS), iMac G5 20-inch (ALS), iMac G5 (17-inch iSight), iMac G5 (20-inch iSight), iMac (Early 2006 17-inch), iMac (Early 2006 20-inch), Mac mini, Mac mini (Late 2005), Mac mini (Early 2006), MacBook Pro, Power Mac G5 (Early 2005), Power Mac G5 (Late 2005), PowerBook G4 (15-inch
MA453Z/A  Disc 1 - 2Z691-5306-A  Disc 2 - 2Z691-5307-A  Disc 3 - 2Z691-5308-A  Disc 4 - 2Z691-5420-A  Disc 5 - 691-5145-A, Ver 2.0   The iwork cd is 603-6242.
http://www.welovemacs.com/2z6915306a.html

Mac Book will not boot

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