My macbook air wont boot up past the loading screen. UPDATE

My 2008 macbook air will turn on, and then go to the apple screen with the loading wheel, but after a few minutes of loading it just shuts down...
Here is an update of the problem after i messed around with it for a bit.
I start up the macbook while holding Command+s
Then it brings up the prompt.
I then type: /sbin/fsck -fy
It then outputs a message saying:
disk0s2: I/0 error.
Invalid sibling link
(4, 42746)
**The volume macintosh HD could not be repaired.
/dev/rdisk0s2 (hfs) EXITED WITH SIGNAL 8
After that, i type in: /sbin/mount -uw /
Then I type: exit
It runs the logout scripts and then immedietly boots up fine, like the computer has no problem.
It works fine like this, but i dont want to have to do those steps every time I want to use my macbook...
Any help on how to fix this?

I have a similar problem. Not sure you're on here (since the post is really old) but did you manage to work it out? How?
My thread:
https://discussions.apple.com/message/19007548#19007548
My Imac froze earlier today as I was dragging an image from safari into indesig and when it froze the weirdest pattern overlaid the screen. It looked just like the opacity pattern from photoshop with grey and white squares. I turned the computer off using the power button and unplugged everything.
Now when I try to start it these weird lines appear on my start up screen (see link)...
http://meijerladdaruppgrejer.wordpress.com/2012/07/24/oops/
as you can see the apple and the wheel appears as normal...
... then it moves to a normal looking white screen (perhaps a bit greener than usual) and around 30 seconds later freezes at the blue screen.
I've tried the cmd + alt + p + r several times but it won't help.
If i press alt during start up I can see and choose my hard drive but just end up at the blue screen again.
Can I try starting it up in safe mode or something?

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My MacBook Air can't get past the gray screen with the apple logo. What's the fix?

My MacBook Air can't get past the gray screen with the Apple logo, so I can't login. Does anyone know the fix for this?

Take each of these steps that you haven't already tried. Stop when the problem is resolved.
Step 1
The first step in dealing with a boot failure is to secure your data. If you want to preserve the contents of the startup drive, and you don't already have at least one current backup, you must try to back up now, before you do anything else. It may or may not be possible. If you don't care about the data that has changed since your last backup, you can skip this step.
There are several ways to back up a Mac that is unable to boot. You need an external hard drive to hold the backup data.
a. Boot into Recovery by holding down the key combination command-R at the startup chime, or from a local Time Machine backup volume (option key at startup.) Release the keys when you see a gray screen with a spinning dial. When the OS X Utilities screen appears, launch Disk Utility and follow the instructions in the support article linked below, under “Instructions for backing up to an external hard disk via Disk Utility.”
How to back up and restore your files
b. If you have access to a working Mac, and both it and the non-working Mac have FireWire or Thunderbolt ports, boot the non-working Mac in target disk mode by holding down the key combination command-T at the startup chime. Connect the two Macs with a FireWire or Thunderbolt cable. The internal drive of the machine running in target mode will mount as an external drive on the other machine. Copy the data to another drive. This technique won't work with USB, Ethernet, Wi-Fi, or Bluetooth.
How to use and troubleshoot FireWire target disk mode
c. If the internal drive of the non-working Mac is user-replaceable, remove it and mount it in an external enclosure or drive dock. Use another Mac to copy the data.
Step 2
Press and hold the power button until the power shuts off. Disconnect all wired peripherals except those needed to boot, and remove all aftermarket expansion cards. Use a different keyboard and/or mouse, if those devices are wired. If you can boot now, one of the devices you disconnected, or a combination of them, is causing the problem. Finding out which one is a process of elimination.
Before reconnecting an external storage device, make sure that your internal boot volume is selected in the Startup Disk pane of System Preferences.
Step 3
Boot in safe mode.* The instructions provided by Apple are as follows:
Shut down your computer, wait 30 seconds, and then hold down the shift key while pressing the power button.
When you see the gray Apple logo, release the shift key.
If you are prompted to log in, type your password, and then hold down the shift key again as you click Log in.
Safe mode is much slower to boot and run than normal, and some things won’t work at all, including wireless networking on certain Macs.
The login screen appears even if you usually log in automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.
*Note: If FileVault is enabled, or if a firmware password is set, or if the boot volume is a software RAID, you can’t boot in safe mode. Post for further instructions.
When you boot in safe mode, it's normal to see a dark gray progress bar on a light gray background. If the progress bar gets stuck for more than a few minutes, or if the system shuts down automatically while the progress bar is displayed, your boot volume is damaged and the drive is probably malfunctioning. In that case, go to step 5.
If you can boot and log in now, reboot as usual (i.e., not in safe mode.) If the boot process hangs again, the problem is likely caused by a third-party system modification that you installed. Post for further instructions.
Step 4
Sometimes a boot failure can be resolved by resetting the NVRAM.
Step 5
Launch Disk Utility in Recovery mode (see above for instructions.) Select your startup volume, then run Repair Disk. If any problems are found, repeat until clear. If Disk Utility reports that the volume can't be repaired, the drive has malfunctioned and should be replaced. You might choose to tolerate one such malfunction in the life of the drive. In that case, erase the volume and restore from a backup. If the same thing ever happens again, replace the drive immediately.
This is one of the rare situations in which you should also run Repair Permissions, ignoring the false warnings it produces. Look for the line "Permissions repaired successfully" at the end of the output. Then reboot as usual.
Step 6
Boot into Recovery again. When the OS X Utilities screen appears, follow the prompts to reinstall the OS. If your Mac was upgraded from an older version of OS X, you’ll need the Apple ID and password you used to upgrade.
Note: You need an always-on Ethernet or Wi-Fi connection to the Internet to use Recovery. It won’t work with USB or PPPoE modems, or with proxy servers, or with networks that require a certificate for authentication.
Step 7
Repeat step 6, but this time erase the boot volume in Disk Utility before installing. The system should automatically reboot into the Setup Assistant. Follow the prompts to transfer your data from a backup.
Step 8
If you get this far, you're probably dealing with a hardware fault. Make a "Genius" appointment at an Apple Store to have the machine tested.

My i mac wont boot up past the start screen

My imac wont boot up past the grey screen with the apple logo, the progress bar gets to about midway and stalls at this point.
I even left the system on in this state for the remainder of the day to no avail.
The original problem which resulted in the grey screen, was that when the system did boot up i had a black screen with only the task bar, however when the task bar tabs opened i could not get any of the options to actually operate/function. At this point i turned the system of and after the third attempt the system faltered to the grey screen.
I have tried the Safe mode boot/nram/pra/smc rests but the system still stalls midway on the progress bar, even holding the c key.
Help please....

See if the computer will boot into the Recovery Partition (Command + R on startup) if it won't that means the HD has likely crashed and the ONLY thing to do is get it serviced.

My MacBook will not boot up past the white screen and rotating circle

Tried to start up my MacBook. Can't get past the white screen and rotating circle. Left it on for 10 min. same results. Any solutions before I bring it in for repair? Thanks.

Zap the pram
Maybe wait longer and see if it does anything or if anything comes up.

Macbook Pro wont start up past the grey screen

The computer is only four months old, fans sound like they are working, and the screen stays on when the power cord is out. I put in the Mac Os X disk today so that I could reset the admin password and as the computer restart for the program it's been stuck on the grey apple screen. If you have anything I can try and do that would be great

I had the same issue. I would start up my MacPro Desktop, and nothing happened but for the startup chime and the screen going blank. No Apple, no Beachball, no Nothing. I even tried booting from my DVD, and that would not work. So... it was dead, dead, dead and I could not do a thing about it. I tried all the rubber chicken procedures such as booting with the shift key, disconnecting everything, even the keyboard in the end, and taking out two of my four hard drives, doing all the things that the Mac Tech Support (on the phone) advised me to do.
Mac Tech support tried their best and booked an appointment for me at the Bondi Genius Bar, and I sat on the stool fully expecting to hear the worst. It turned out that the culprit was a corrupt internal eSATA disk, and when it was removed, the computer started up beautiully and recognised my other system disks.
Funny, I had removed the disk with Snow Leopard on it, thinking that it was a corrupt System disk, but no, it was another disk which I had fortunately up the night before this happened! I noted that the Mac was taking an inordinately lengthy time to shut down after that, which made me rather nervous about the next start up.
The defective disk had no system on it, and therefore, I never even thought of taking it out. It seemed to an illogical thing to do at the time, as I did not believe that a disk with no system could cause any problem.
Now I am sitting at my trusty Mac Pro and it is working Better than Ever, and I replaced the faulty 280GB disk with a Samsung 500GB disk I took out of my slow as a wet week LaCie Big Disk Network Attatched Storage. I re-initiallised this disk and it is now working flawlessly as I have been copying data to the SamSung disk now.
So, the upshot of all this is, is that nowhere is there any reference to a single disk in a bay that can cause the whole Mac not to start up properly! My advice is to those with that problem, remove your disks out of the bays, one at a time to find out if it is a disk causing the problem.

My macbook air wont boot up. Just beeps every 5 seconds and a white light flashes on front of keyboard

My macbook air wont boot up. Just beeps every 5 seconds and a white light flashes on front of keyboard

That normally indicates an issue with system memory. The startup sequence can't complete the boot due to a memory issue. Take it in for service.

My ipad wont boot up past the apple icon

my ipad wont boot up past the apple icon

Frozen or unresponsive iPad
Resolve these most common issues:
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    •    Touch screen not responding
    •    Application unexpectedly closes or freezes
http://www.apple.com/support/ipad/assistant/ipad/
iPad Frozen? How to Force Quit an App, Reset or Restart Your iPad
http://ipadacademy.com/2010/11/ipad-frozen-how-to-force-quit-an-app-reset-or-res tart-your-ipad
What to Do When Your iPad Won't Turn On
http://ipad.about.com/od/iPad_Troubleshooting/ss/What-To-Do-When-Your-Ipad-Wo-No t-Turn-On.htm
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http://support.apple.com/kb/TS3281
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http://support.apple.com/kb/TS3274
 Cheers, Tom

My macbook air won't get past the white apple screen. I've tried power cycling the batter but won't help

my macbook air won't get past the white apple screen. I've tried power cycling the batter but won't help

Take each of these steps that you haven't already tried. Stop when the problem is resolved.
Step 1
The first step in dealing with a startup failure is to secure the data. If you want to preserve the contents of the startup drive, and you don't already have at least one current backup, you must try to back up now, before you do anything else. It may or may not be possible. If you don't care about the data that has changed since the last backup, you can skip this step.
There are several ways to back up a Mac that is unable to start. You need an external hard drive to hold the backup data.
a. Start up from the Recovery partition, or from a local Time Machine backup volume (option key at startup.) When the OS X Utilities screen appears, launch Disk Utility and follow the instructions in this support article, under “Instructions for backing up to an external hard disk via Disk Utility.” The article refers to starting up from a DVD, but the procedure in Recovery mode is the same. You don't need a DVD if you're running OS X 10.7 or later.
b. If Step 1a fails because of disk errors, and no other Mac is available, then you may be able to salvage some of your files by copying them in the Finder. If you already have an external drive with OS X installed, start up from it. Otherwise, if you have Internet access, follow the instructions on this page to prepare the external drive and install OS X on it. You'll use the Recovery installer, rather than downloading it from the App Store.
c. If you have access to a working Mac, and both it and the non-working Mac have FireWire or Thunderbolt ports, start the non-working Mac in target disk mode. Use the working Mac to copy the data to another drive. This technique won't work with USB, Ethernet, Wi-Fi, or Bluetooth.
d. If the internal drive of the non-working Mac is user-replaceable, remove it and mount it in an external enclosure or drive dock. Use another Mac to copy the data.
Step 2
If the startup process stops at a blank gray screen with no Apple logo or spinning "daisy wheel," then the startup volume may be full. If you had previously seen warnings of low disk space, this is almost certainly the case. You might be able to start up in safe mode even though you can't start up normally. Otherwise, start up from an external drive, or else use the technique in Step 1b, 1c, or 1d to mount the internal drive and delete some files. According to Apple documentation, you need at least 9 GB of available space on the startup volume (as shown in the Finder Info window) for normal operation.
Step 3
Sometimes a startup failure can be resolved by resetting the NVRAM.
Step 4
If you use a wireless keyboard, trackpad, or mouse, replace or recharge the batteries. The battery level shown in the Bluetooth menu item may not be accurate.
Step 5
If there's a built-in optical drive, a disc may be stuck in it. Follow these instructions to eject it.
Step 6
Press and hold the power button until the power shuts off. Disconnect all wired peripherals except those needed to start up, and remove all aftermarket expansion cards. Use a different keyboard and/or mouse, if those devices are wired. If you can start up now, one of the devices you disconnected, or a combination of them, is causing the problem. Finding out which one is a process of elimination.
Step 7
If you've started from an external storage device, make sure that the internal startup volume is selected in the Startup Disk pane of System Preferences.
Start up in safe mode. Note: If FileVault is enabled, or if a firmware password is set, or if the startup volume is a software RAID, you can’t do this. Post for further instructions.
Safe mode is much slower to start and run than normal, and some things won’t work at all, including wireless networking on certain Macs.
The login screen appears even if you usually log in automatically. You must know the login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.
When you start up in safe mode, it's normal to see a dark gray progress bar on a light gray background. If the progress bar gets stuck for more than a few minutes, or if the system shuts down automatically while the progress bar is displayed, the startup volume is corrupt and the drive is probably malfunctioning. In that case, go to Step 11. If you ever have another problem with the drive, replace it immediately.
If you can start and log in in safe mode, empty the Trash, and then open the Finder Info window on the startup volume ("Macintosh HD," unless you gave it a different name.) Check that you have at least 9 GB of available space, as shown in the window. If you don't, copy as many files as necessary to another volume (not another folder on the same volume) and delete the originals. Deletion isn't complete until you empty the Trash again. Do this until the available space is more than 9 GB. Then restart as usual (i.e., not in safe mode.)
If the startup process hangs again, the problem is likely caused by a third-party system modification that you installed. Post for further instructions.
Step 8
Launch Disk Utility in Recovery mode (see Step 1.) Select the startup volume, then run Repair Disk. If any problems are found, repeat until clear. If Disk Utility reports that the volume can't be repaired, the drive has malfunctioned and should be replaced. You might choose to tolerate one such malfunction in the life of the drive. In that case, erase the volume and restore from a backup. If the same thing ever happens again, replace the drive immediately.
This is one of the rare situations in which you should also run Repair Permissions, ignoring the false warnings it may produce. Look for the line "Permissions repair complete" at the end of the output. Then restart as usual.
Step 9
If the startup device is an aftermarket SSD, it may need a firmware update and/or a forced "garbage collection." Instructions for doing this with a Crucial-branded SSD were posted here. Some of those instructions may apply to other brands of SSD, but you should check with the vendor's tech support.
Step 10
Reinstall the OS. If the Mac was upgraded from an older version of OS X, you’ll need the Apple ID and password you used to upgrade.
Step 11
Do as in Step 9, but this time erase the startup volume in Disk Utility before installing. The system should automatically restart into the Setup Assistant. Follow the prompts to transfer the data from a Time Machine or other backup.
Step 12
This step applies only to models that have a logic-board ("PRAM") battery: all Mac Pro's and some others (not current models.) Both desktop and portable Macs used to have such a battery. The logic-board battery, if there is one, is separate from the main battery of a portable. A dead logic-board battery can cause a startup failure. Typically the failure will be preceded by loss of the settings for the startup disk and system clock. See the user manual for replacement instructions. You may have to take the machine to a service provider to have the battery replaced.
Step 13
If you get this far, you're probably dealing with a hardware fault. Make a "Genius" appointment at an Apple Store, or go to another authorized service provider.

I have been given a iphone3gs today and after restoring it to factory settings like i was adviced to, my phone now wont boot up past the apple logo, it will switch to black screen if i press both buttons. I havnt managed to sync it to itunes. how do i get

I have been given a iphone3gs today and after restoring it to factory settings like i was adviced to, my phone now wont boot up past the apple logo, it will switch to black screen if i press both buttons. I havnt managed to sync it to itunes. how do i get it to work???

Try to connect in recovery mode, explained in this article: iOS: Unable to update or restore

G5 mac wont boot up past white apple screen

My kids mac wont boot up past the white apple screen. I can here everything running but the monitor starts to get all static and scan lines with a reddish tint to it. I tried the commandoption+pr but it still wouldn't boot-up past the white apple screen. Not sure what else to do. Any help would be greatly appreciated. Thanks in advance

Hi there Peter,
Not cheap anyway you look at it sorry, professional Data Recovery being the most expensive.
Unfortunately, Disk Utility can't fix all that much, and the only other Apple Options are erasing the HD, or installing OSX to a second drive, then using Migration Assistant to move stuff over to the new HD.
If Disk Utility or fsck should fail to repair it, your best bet is DiskWarrior from Alsoft, you'll need the CD to boot from if you don't have another boot drive...
http://www.alsoft.com/DiskWarrior/
Your best bet is DiskWarrior, you need the CD/DVD though.
http://www.alsoft.com/DiskWarrior/
But others that may work…
Drive Genius 2…
http://www.prosofteng.com/products/drive_genius.php
TechTool Pro 4…
http://www.micromat.com/index.php?option=com_content&task=view&id=31&Itemid=83
Data Rescue II...
http://www.prosofteng.com/products/data_rescue.php
This one would require another HD with plenty of space to recover to.
You should use another Boot Disk or other Mac with this one in Target mode to do the recovery.
They have a free demo to see what it could recover.

My macbook pro will not get past the gray screen with the apple logo and a loading bar.

My macbook pro will not get past the grey screen with the apple logo after attempting to load for hours. I have already tried resetting the NVRAM/PRAM and a couple other tricks and no luck. Anyone out there have suggestions for my problem? Help would be much appreciated since i use my computer for everything at school and i am in desperate need to get this baby working again.

You didn't say which OS in your tag, but maybe you might find something here.
http://support.apple.com/kb/TS2570
http://support.apple.com/kb/PH4191
http://support.apple.com/kb/PH7213
http://support.apple.com/kb/HT4125
http://support.apple.com/kb/HT2213

My iMac won't boot up past the white screen with a grey apple and spinning icon

My iMac won't boot up past the white screen with a grey apple and spinning icon...please help!

command R did not result in anything different - still the white screen, etc. I do you Time Machine with and external hard drive, but I unplugged that. I have the installation DVD, but it doesn't seem to be reading it either.

My iMac starts, but won't get past the loading screen?

My iMac starts up, but won't even get past the white screen with the Apple logo.
It kept giving me black screens, and would not start in safety mode. After command + option + p + r, the black screens stopped coming, but it still won't get past the loading screen, if I let it load long enough the Apple logo is replaced by a "denied" symbol but that is the only thing that happens. By hitting command + d, I was told nothing is wrong. When pressing command + r and going to disk utility, it found an issue while verifying and repairing. At first it stated "invalid journal" but now it only says to reinstall everything and that the problem couldn't be solved. I cannot mount the harddrive, and Time Machine just searches for copies without getting anywhere. When I try installing OS X (Mavericks) again, the harddrive doesn't even show up. What do I do?

The HD sounds like it has crashed, take it into your local Apple Store or Apple Authorized Service Provider (AASP), if you bought AppleCare this will be covered. If you don't have an Apple Store in your area and don't know of any AASPs then please click https://locate.apple.com/country to begin finding one.

My iphone 3gs shut off and now wont make it past the apple screen i put it in recovery mode but when i do connect it to my itunes the phone will just shut off and keep going into recoveryt mode its really ******* me off please help!!!

my iphone 3gs died and now it wont make it past the apple logo screen so i put it in recovery mode and hooked it up to my itunes on my home computer now it will say do you want to restore this iphone i click ok but then after it exctracts the software then starts to restore the screen goes black and it shuts off then 10 seconds later it turns back on it wont make it past extracting software please help me im getting really mad plaease help. it wont restore my phone and the error message 1611 come up i dont get it.. also the lock button on my iphone is broken and only works when i squeeze the topo of the iphone together so i cant put it in DFU mode

Here is what you should do turn the device on hold the home button and the power button until the device turn off keep holding and when the device reboots release the power button but hol the home button until it shows the iTunes logo then restore it

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Okay well, to start off, I got my MacBook from a distant family member who got a new one so they let me have their old one. They got it from a pawn shop so I don't have the disk that we got the OS from but it hasn't had any issues UNTIL NOW. I need to use my laptop for a homework assignment so please help me quickly. Everytime I turn it on it'll just stay on the loading screen, I left it for 4 hours yesterday and it still wouldn't work. I reset the (insert acronym here) thing already, the thing where you press control, option, P, R keys at start up. I really need help because my assignment is on the laptop and it's due tomorrow. Please help. ={ And I'm not entirely sure which OS it's using because I've never really checked.

Boot from the OS DVD you have for the computer.
Repair the Hard Drive and Permissions
Boot from your OS X 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 Utilities menu. 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 installer.
If DU reports errors it cannot fix, then you will need Disk Warrior and/or Tech Tool Pro to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.
You can reinstall OS X, but the procedure depends on the version of OS X that is installed.

My macbook air wont boot up past the loading screen. UPDATE

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