HELP - MacBook Pro won't start up - get complex error!

Dear All would be VERY grateful if someone could help me - please note that this is NOT a standard error. I have read the manual on start-up problems and they have not resolved the issue.
The problem is that my MacBook fails to launch OSX, though it did produce the start-up sound and the spinning gear symbol. After this, it displays a terminal with the following error:
localhost kextd[25]: couldn't start up diskarb sessions
it does this about 7 times then:
localhost kextd[25]: giving up on diskarb: auto-rebuild disabled.
I tried to use the Installation Disk to get to Disk Utilities to fix the problem but nothing happened and I couldn't even eject the CD!
Any advice would be much appreciated, especially if you have encountered a similar error. Thanks in advance for your help.

Try this
Boot holding down Apple/S and don't let go until you see scrolling text.
When that stops and you see a root#: prompt enter
fsck -fy
Let it run through all the checks and repairs.
If it fails first time, at any time, or finds and fixes a fault - run the command again and keep doing so (some fixes can take several passes) until it says "Appears to be OK" then enter
reboot

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Help - Macbook Pro won't start after running update

I just checked the FAQs here and ran several searches and have not found an answer to my problem. I sure hope someone here can help.
Today I installed the big batch of updates Apple released recently (I think it was on July 31) on my 2.4 GHz Macbook Pro. When I turned it on, I was told there was one last update that required me to turn off the machine and then hold down the power button.
I did, and the machine started to come on, but I guess I held the button down a little too long. Now the machine won't turn on. Everytime I press the button, I hear the same sound I always get when I turn on my machine, except that now the sound just goes on and on and on, and the MBP never actually boots up.
I wish I could remember the exact name of the update. I think it might be the EFI Firmware Update 1.2 that's described at http://www.apple.com/support/downloads/macbookproefifirmwareupdate12.html. That scares me because the words "Important: Do not interrupt the update" suggest things can go badly if the update doesn't go right the first time.
Any advice as to what I should do?

That sounds like an interrupted firmware update. And Macs with interrupted firmware updates are very unhappy Macs!
You will need to restore your firmware to it's original state, then reapply the update. For this, you'll need to create a Firmware Restoration CD.
See this page:
http://docs.info.apple.com/article.html?artnum=303469
Here's one of the more important sections of the page: +"If your computer is already in this state, you'll need to download the software and create the CD on another Macintosh computer, or you can take your computer to an Apple Store or Apple Authorized Service Provider to restore your firmware. This CD can be created on both PowerPC- and Intel-based Macintosh computers."+
You might be better off just taking it in to an Apple Store.
Ps. When you get a chance, you might want to update OS information in your forum settings - I'm pretty sure you're not running 10.3.8 Panther on your MBP!

Help! macbook pro won't start up, horrible beep + error

When I start up my mac I get a horrible beep from the os x.
I already buyed myself a new battery
I made a picture of the error.
Can please someone tell me what to do?
my mac: macbook pro early 2009. 2.66 ghz

hello,
I went back home 2 get the discs
The first methode ( throw windows) didnt work for me
So I booted mac again. I hold down the C button to get 2 the install disc.
( i hoped I didnt get the beep or the error screen)
Thankfully it started (after holding c button) my installation disc. @ the moment Im erasing the whole drive. ( i already have a backup of the important files )
Thank you for your help and time. I almost buyed a new hard drive because I thought the harddrive is probably broken.

Help - MacBook Pro Won't Start Up.

I have a three year old MacBook pro 13". The battery is fully charged, but the computer wont start up. I have tried holding down opt+shift+control + the power button for 15 sec and that did not work. I also tried disconnecting the battery from the main board then reattaching and trying to start up and that didnt work either. Is this the logic board? Does this need to be brought in for a fix or are there any other things I can do to reboot?

If a SMC reset did not breath life into your MBP, then a trip to the Apple store genius bar is your best option.
Ciao.

HELP: MacBook Pro won't start. MachKernel/slow/no entry sign/erratic

(having major issues figuring out which forum to post this question... In error, I posted this last night to the Mac Pro forum, then this morning to the OSX Leopard Forum. I think it goes here.)
MacBook has been running slow the past couple of days. Yesterday, it wouldn't start-up, and after resetting the PRAM, I got the no-entry sign (barred circle).
Restarting with V: I got a mach kernel error. Found a help sheet on that, but when trying to restart with X, got only as far as the blue screen.
This morning, miraculously, it started up, very slow. I then tried to backup my files, with no success. Tried to burn to a dvd, but that was unsuccessful. (Later at the Apple Store where I was able to backup a few essential files realized that the Burn DVD folder was empty.
Tried to restart using it in target disc mode using FireWire, but on my good macbook, although the slave computer appears, I couldn't access any data ("alias can't be found")
I've tried restarting from a bootable disc. It gets past the apple, the gears, then I can just hear the dvd drive spinning and eventually, I force quit. So restarting from a bootable disc seems out.
For a while, it would startup, but aside from the hard drive icon, the file (pdf, doc, and jpg) icons on my desktop wouldn't change from generic to specific and the rainbow wheel just kept spinning and spinning. I finally forced quit.
Update: Just got back from the AppleStore where I was able to backup a few essential files. It started up again, very very slowly, and all the icons finally changed to their specific thumbnails.
It appears as though it works better if it's rested for a while, although I'm not kidding myself: it does appear as though the hard drive is failing. After the trip to the AppleStore, I bought an 320GB hard drive. I'd like to finish backing up - please don't ask me why I didn't do this before going to the AppleStore...
Anyway, any help much appreciated,
--Laura

I've goggled just about everything and I can't seem to fix this problem.
You shouldn't!
You are still under warranty. Call Apple Care. Make sure you get a case number as all repairs have an additional 90 days of warranty.
#1 - You have 14 days from the date of purchase to return your computer with no questions asked.
#2 - You have 90 days of FREE phone tech support.
#3 - You have the standard one year Apple warranty.
#4 - If you've purchased an AppleCare Protection Plan, your warranty last for 3 years. You can obtain AppleCare anytime up to the first year of the purchase of your computer.
Take FULL advantage of your warranty. Posting on a message board should be done as a last resort and if you are out of warranty or Apple Care has expired.

My Macbook Pro won't start up. All I get is a grey screen showing a grey folder bearing a question mark. Help please!

My Macbook Pro won't start up. All I get is a grey screen showing a grey folder bearing a question mark. Help please!

The folder with the question mark indicates that the machine is unable to find a bootable volume on startup. This is typically caused by one of three things:
1.) The internal HD has failed or is failing and needs to be replaced
2.) There is significant directory damage to the volume that requires repairing in order to boot
3.) Some other internal component failure between the HD and logic board
I'd ranked them in the order that is most common (from my personal experience). Boot to the OS X Recovery tool and attempt to repair the startup volume. If that fails or the drive is not detected it's usually a tell tale sign of a failed HD.

Hi! My MacBook Pro won't start! HELP !!!

Hi! My MacBook Pro won't start! I have tried everything I can think of like Safe Mode (doesn't work), Recovery (does not find Recovery Drive), Booting with OS Snow Leopard Cd (doesn't work)...
I have really no clue about what to do now... I paid quite a lot of money for this computer and am pretty short of money nowadays! Would like to repair with help rather than having to take it to Apple Store.
Has anyone had this same problem?
All I get is white screen + grey Apple and spinning grey disk... it's 100% frustrating! Any help would be more than welcome since I think i've tried EVERY SUGGESTION on this Support Center and Youtube videos...
This MBP is from 2011, runs on OS X 10.6.8
I tried booting with OS X Snow Leopard CD, it didn't work! (my cd player works! recognizes the Snow Leopard CD, but then never opens it... goes back forever to the with screen + apple and spinning disk)
I don't care about the content, it's OK if i lose all DATA... I just want to bring this Mac BACK TO LIFE!
When i run coomand on root# fsck -fy --> RESULT = my HD was checked and seems to be FINE!
Thanks

Please make a Genius Appointment and take it in for service.

HT1379 Guys please help? My MacBook Pro won't start up. I have tried the resetting Mac's PRAM and NVRAM procedure with no success. All I see is just the black or grey screen although I hear the drive running.

Guys please help? My MacBook Pro won't start up. I have tried the resetting Mac's PRAM and NVRAM procedure with no success. All I see is just the black or grey screen although I hear the drive running.

Hold shift key down while booting should get you in
go through this list and get back with me
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My MacBook Pro, won't start up / log in... Help!!

My MacBook Pro, won't start up. Takes ages to turn on, eventually the password screen comes up, I enter my password (which is correct and hasn't changed) press return, and looks like it will load, then goes back to the login screen... Help!!

Run through this massive list of user capable fixes tailored to isolate and identify where your problem(s) are, get your machine working again or call a local PC/Mac software repair and data recovery shop, if it's hardware problem, take it to Apple.
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My MacBook Pro won't start up please help me

MacBook Pro won't start up what should I do?

Hey eddydamasio,
Thanks for the question. I understand that your MacBook Pro won’t turn on. The following article may help to resolve your issue:
Troubleshooting: My computer won't turn on
http://support.apple.com/kb/TS1367
Note: if you hear a startup chime or the fans running, see this article instead:
Apple computers: Troubleshooting issues with video on internal or external displays
http://support.apple.com/kb/HT1573
Thanks,
Matt M.

My macbook pro won't start up. I get the white screen and the grey apple icon   the spinning wheel......and it doesn't change !

My macbook pro won't start up. I get the white screen and the grey apple icon   the spinning wheel......and it doesn't change !

Take each of these steps that you haven't already tried. Stop when the problem is resolved.
To restart an unresponsive computer, press and hold the power button for a few seconds until the power shuts off, then release, wait a few more seconds, and press it again briefly.
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 a desktop Mac hangs at a plain gray screen with a movable cursor, the keyboard may not be recognized. Press and hold the button on the side of an Apple wireless keyboard to make it discoverable. If need be, replace or recharge the batteries. If you're using a USB keyboard connected to a hub, connect it to a built-in port.
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 in OS X 10.9 or earlier, 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.

`my macBook Pro won't start up. Just get that gray blueshy kind of screen and don't go nowhere.

My MacBook Pro won't start up. Just get that gray, blueishy screen and don't go on.

Try a safe boot.
http://support.apple.com/kb/TS2570
This boot takes longer than a normal boot, be patient. If it boots login, and see if it seems normal. If so, logout and reboot normal.

Installed Yosemite...now my MacBook pro won't start up. Keep showing "Kernel Panic!" HELP!

installed Yosemite and now my MacBook pro won't start up. Keeps showing "kernel panic"
PLEASE HELP ME!

If you can't start up and log in in the usual way, try in safe mode.
During startup, you’ll see a progress bar, and then the login screen, which appears even if you normally 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.
Log in as an administrator to carry out these instructions. If you have only one account, you are the administrator.
☞ If you don't see any reports listed, but you know there was a panic, you may have chosen Diagnostic and Usage Messages from the log list. Choose DIAGNOSTIC AND USAGE INFORMATION instead.
Safe mode is slower than normal, and some things won’t work at all.
Note: If FileVault is enabled in OS X 10.9 or earlier, or if a firmware password is set, or if the startup volume is a software RAID, you can’t start in safe mode.
If you're able to log in, launch the Console application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Console in the icon grid.
In the Console window, select
DIAGNOSTIC AND USAGE INFORMATION ▹ System Diagnostic Reports
(not Diagnostic and Usage Messages) from the log list on the left. If you don't see that list, select
View ▹ Show Log List
from the menu bar.
There is a disclosure triangle to the left of the list item. If the triangle is pointing to the right, click it so that it points down. You'll see a list of reports. A panic report has a name that begins with "Kernel" and ends in ".panic". Select the most recent one. The contents of the report will appear on the right. Use copy and paste to post the entire contents—the text, not a screenshot.
I know the report is long, maybe several hundred lines. Please post all of it anyway.
In the interest of privacy, I suggest that, before posting, you edit out the “Anonymous UUID,” a long string of letters, numbers, and dashes in the header of the report, if it’s present (it may not be.)
Please don’t post other kinds of diagnostic report.

My MacBook pro won't start. It is frozen on the gray screen with the apple. Please help?

My MacBook pro won't start. It's stuck on the gray screen with the apple logo.

Reinstall OS X:
Reinstall Snow Leopard without erasing the drive
Do the following:
1. Repair the Hard Drive and Permissions
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 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.
2. Reinstall Snow Leopard
If the drive is OK then quit DU and return to the installer. Proceed with reinstalling OS X. Note that the Snow Leopard installer will not erase your drive or disturb your files. After installing a fresh copy of OS X the installer will move your Home folder, third-party applications, support items, and network preferences into the newly installed system.
Download and install the Combo Updater for the version you prefer from support.apple.com/downloads/.
Reinstalling Lion 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 Lion: Select Reinstall Lion and click on the Continue button.
Note: You can also re-download the Lion installer by opening the App Store application. Hold down the OPTION key and click on the Purchases icon in the toolbar. You should now see an active Install button to the right of your Lion purchase entry. There are situations in which this will not work. For example, if you are already booted into the Lion you originally purchased with your Apple ID or if an instance of the Lion installer is located anywhere on your computer.

I was messing around with .kext files in the MacintoshHD and now my MacBook Pro won't start up.

I was messing around with .kext files in the MacintoshHD and moved the system.kext and two others to my desktop and deleted the originals and now the MacBook Pro won't start up. All I get at start up is the apple icon then a bunch of text shows up part of which says Mac OS version: not yet set. then the apple icon turns into the power icon and tells me to turn off the computer. I've tried reinstalling from the install DVD by holding down option when powering on and selecting the install DVD and it just goes to a white screen with the apple icon and stays like that. I didn't have the disk utility on my Mac before this happened because I deleted it to make room on my computer a while ago so I'm not sure if that's why it won't load the install DVD but anyone who knows the solution to this with out going to get it repaired would be greatly appreciated. Thank you!

Never mind my dad just found the original install DVD and that worked. Before I was using an install disc that Apple sent me for another issue I was having, but thanks for replying so quickly and trying to help on this Thanksgiving day!!!

HELP - MacBook Pro won't start up - get complex error!

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