MacBook Pro won't start up after PRAM restart and a control/command restart

My iPhone 4 froze up and I tried to sync and restore the iPhone software. This made my iTunes prompt me to restart my Mac. Now it will not start up. It stops after the chime and grey screen comes on. I have tried a PRAM restart with no luck. Can anyone help?

So are you saying that it will not boot from the OSX installation disk?
It might be worth trying an SMC reset as described here:
http://support.apple.com/kb/HT1411?locale=en_GB

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MacBook Pro won't start up after chime, MacBook Pro won't start up after chime

MacBook Pro won't start up after chime, MacBook Pro won't start up after chime

Try resetting the SMC.
Barry

Macbook Pro won't start up after removing and putting back battery

One week ago I spilled two drops (literally) of water on the drag pad of my MacBook Pro (model A1278). Some of this water went down the top edge of the drag pad. Since this happened, the cursor as either not been been responding at all to my drag pad, or it has been behaving very eratically, as well as this, over the last couple of months since buying this MacBook, there has been an abnormal amount of dust in the air in the house due to some building work going on here. This being so, I decided to follow a video tutorial in you tube on how to remove and clean the drag pad. This involved getting access to the laptop by unscrewing the back, unscrewing and disconnecting the battery, then unscrewing and disconnecting the drag pad, so this it could be handled and cleaned. I followed the video to the letter, taking great care. I cleaned the drag pad as instructed, and replaced it. I did the same thing with the battery. All screws and the two simple 'plug in' connections for both the drag pad and battery have been replaced smoothly and exactly as I found them. but after putting the back panel on the MacBook, it will not turn on. It will not power up, either by the battery alone, or by using the mains power lead. There is a green light showing on the power lead input, but it is nowhere near as bright as it usually is. So I have gone from having a poorly functioning drag pad, to now having a MacBook Pro which won't even turn on! I have no idea what has happened. Please can anyone help? Thanks.

So are you saying that it will not boot from the OSX installation disk?
It might be worth trying an SMC reset as described here:
http://support.apple.com/kb/HT1411?locale=en_GB

'09 MacBook Pro won't start up after installing new hard drive and restoring from an external hard drive.

I am in the process of replacing my hard drive and have run into a problem. I reinstalled OSX 10.6.3 using a DVD I bought off Amazon. That went well and I then restored my hard drive using an external and Time Machine.
After that, things still looked good but I couldn't log in to my user (and access my MacBook) because my password wasn't working even though my hint was correct. Yes, I am POSITIVE my password was correct; I even tried a couple other passwords to humor myself. I then gave up and decided to restart the computer.
Now my MacBook won't start up at all. It goes o a gray screen with a still loading symbol for a couple minutes and then goes to a solid light blue screen. I've tried starting up while holding command+R and I tied holding just command and neither worked.
Did I install the wrong OSX because I didn't use the same DVD that came with the laptop? Is there something wrong with my hard drive already?
Please help =[

You probably bought the wrong RAM that has different pin assignments, so it won't fit in the slot. Return it.
I bought 4GB Memory online for my MacBook, so I could get it to run twice as fast.
Doubling the memory does not make your computer run twice as fast.

MacBook pro won't start up after I tried latest upgrade, 10.7.3

I can't get MacBook pro to start. Stuck with spinning wheel. I have tried safe mode boot and it will not even recognize. Any ideas?

I'll assume you have backups of all your data. If that assumption is wrong, don't follow this suggestion. Boot from your recovery partition (command-R at startup) and reinstall Lion. You don't need to erase the boot volume, and you won't need your backup unless something goes wrong. If your Mac didn’t ship with Lion, you’ll need the Apple ID and password you used to upgrade.

MacBook Pro Won't Start up after leopard Install

I installed leopard on my MacBook Pro 2.0 GHz Intel Core Duo. Well at the end during the restarting phase it took forever to restart and my power was running out so not sure if it restarted or batt went dead. After recharging i turned on mac and wont boot up past the apple with dots hovering it. Don't know much about macs so if you could help it would be appreciated.

MacsReh wrote:
I installed leopard on my MacBook Pro 2.0 GHz Intel Core Duo. Well at the end during the restarting phase it took forever to restart and my power was running out so not sure if it restarted or batt went dead.
Welcome to the Apple boards:
You installed Leopard on battery power? That's a real big no no. A very risky gamble at best.
If your battery died during install, you may well have totally hosed the system.
After recharging i turned on mac and wont boot up past the apple with dots hovering it. Don't know much about macs so if you could help it would be appreciated.
See if you can boot into the Leopard DVD (hold down "C" on boot) and after the language screen, on the top left will be a menu. Select Utilities, run Disk Utility and repair your HD and permissions.
See if that gets you somewhere.
Message was edited by: nerowolfe

MacBook Pro Won't Start Up after USB power draw...

My WD external drive was connected to my MacBook Pro while operating from battery. An onscreen message appeared about drawing power from the USB device and the computer shut down, now it won't restart. The power adapter won't even light up when I attach it. HELP! Its a 2010 MacBook Pro.

Try and reset the systems power management. First disconnect the power adapter then hold down then the next step all has to be done in one sequence. You will need to hold down three keys on keyboard on left side they are shift key, fn key and ctrl key while pushing down the power key hold them all down for 3-5 seconds then let up on all keys and push the power button immediately.
Also you might check the power adapter if you have the square one that you can remove the duckbill then do that while to adapter is unplugged from power source ie wall socket as well as the computer.

My macbook pro won't start up after updating it

I Have a macbook pro with Mavericks (I don't remember exactly which one) which I bought in 2012, yesterday night I updated it and it restarted but it took forever and I thought it was installing something, so I left it like that all night and day and is still in the gray screen with the apple logo and the wait spiral. I got worried so I entered the disk utility option and checked the disk, and it said everything was Ok. When I restarted it again, the gray screen never left so I tried with the "safe rebooting" ctrl + cmnd + V and the screen shows now endless rows of "disk0s2: 1/0 error." and it's been like this for about half an hour now, I'm really worried I'll my data.

An 1/O error cannot be repaired by Disk Utiity.
That requires a more robust disk utility such as DiskWarrior
You can contact the developer using their email address here.
Best to get their recommendation before purchasing.
Hopefully you have a backup to restore from once the drive is either repaired or replaced.

My MacBook Pro won't start up after being forced to quit

What can I do if my computer won't start up? Seems o be stuck

No idea based upon your information, run through this list of fixes.
..Step by Step to fix your Mac
.Create a data recovery/undelete external boot drive

MacBook Pro won't start up after update

I just updated my MacBook last night and now when I turn it on it gets to the grey apple screen and shuts down.

Reset PRAM: http://support.apple.com/kb/PH4405
Try a normal boot.
Perform a Safe Boot: http://support.apple.com/kb/PH14204?viewlocale=en_US
Try a normal boot. If it boots reliably with a Safe Boot but not a normal boot then it is probably a software issue. Post back for more instructions.
If you do not have a recent backup create one in case your disk is failing. (Post back if you need instructions on how to do that w/o booting OS X.)
Boot in Recovery Mode. (Hold down the Command (⌘) and R keys as your computer restarts. If you are running 10.6 or earlier boot from an installation disk.) Run Disk Utility. Click on the upper left system disk icon. Does S.M.A.R.T. report “Verified”?
If it does not say “Verified” then the disk or the disk cable is failing and will need to be replaced. As noted above, if it is failing the first priority is to back it up. Post back for more instructions for emergency data recovery and replacing the disk or its cable.
If the S.M.A.R.T. status is “Verified” then repair the disk. Click on the icon underneath and indented to the right, usually called “Macintosh HD”. Repair Disk. It should finish normally with a green OK message. If it does not try to repair it again.
If it will not finish with a green OK message then having a backup is again essential. The remedy is a clean install: backup, reformat the drive (erasing all the data), reinstall OS X, and then restore form the backup. (Post back if you need instructions on how to do any of those steps.)
If it repaired all errors (green OK) and is still not booting normally “Macintosh HD” icon again and Repair Permissions. Ignore the numerous messages in black. It should finish with a green OK message. If not, run it again.
Once you have repaired the disk and the disk permissions, if it will not boot properly, reinstall OS X:
Boot in Recovery Mode and then install OS X.
If it is still not booting normally after the reinstall then, as a last resort, perform a clean install. Make sure you have a current backup (Time Machine or a clone). Boot in Recovery Mode. Use disk utility to erase the system disk (deleting all data). In the Erase tab click on Security Options… Select “writes a single pass of zeros.” This will write to every block on the disk, mapping out bad blocks. Install OS X. Reload your data from the backup. (On the first boot the Migration Assistant should as you to restore from your backup.)

MY macbook pro would not start up after PRAM reset. HELP

I got the spinning beach ball of death again. And then I held the power button until it turned off. turned it back on and then it had the spinning loading wheel underneath the apple logo upon start up. I waited 10 minutes before holding down the power button again. Then I tried to reset the PRAM. After I thought I did it right. whenever I try and start it up it loads a grey screen that says. "you need to restart your computer. Hold down the power button, wait until your computer is off then press the power button again" and it says this in a few different languages. I need help -please. Thank you. I'm running mac os x leopard version 10.6.4

It sounds like your are suffering a Kernel Panic. I would recommend reading this article about KP's and how to trouble shoot them. If your machine is under warranty or if you have AppleCare you can bring it in and Apple can help you solve the problem.
Resolving Kernel Panics
In addition here is an Apple Article that helps educate you about the problem.
http://support.apple.com/kb/HT1392
Regards,
Roger
Message was edited by: rkaufmann87

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
Step by Step to fix your Mac

MacBook Pro won't start after changing access rights

I did something very wrong. Unfortunately I changed the access rights of Macintosh HD for "everyone" to none.
Result, my MacBook Pro won't start anymore.
Already tried the installation disk, reset password for root and users. No result.
Help program "check acces rigths". Didn't work either.
How do I reset the access rights of Macintosh HD?

https://discussions.apple.com/docs/DOC-2240
The first solution is what you're looking for.

TS2570 My MacBook Pro won't start up.only gray screen

Hi there,
My MacBook Pro won't start it show only gray screen (with apple logo )
And I have tried these solutions none of them worked
1/ Reset PRAM and NVRAM
2/ Restart in safe mode
3/Run Disk Utility in Single User Mode
After I tried third option it shutdown by itself
Please I need data inside the laptop , i have no backup
what should I do ?
I need some kind of solution does not contain formatting or deleting my data
Thank you in advance

..Step by Step to fix your Mac
Create a data recovery/undelete external boot drive
My computer is not working, is my personal data lost?

My MacBook Pro won't start up. What do I do?

My MacBook Pro won't start up. What do I do?

Try these in order testing your system after each to see if it's back to normal:
1. a. Resetting your Mac's PRAM and NVRAM
    b. Intel-based Macs: Resetting the System Management Controller (SMC)
2. Restart the computer in Safe Mode, then restart again, normally. If this doesn't help, then:
     Boot to the Recovery HD: Restart the computer and after the chime press and hold down the
     COMMAND and R keys until the Utilities 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.
3. Repair the Hard Drive and Permissions: Upon startup select Disk Utility from the Utilities 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. Select Restart from the Apple menu.
     Reinstall the 10.9.3 update: OS X Mavericks 10.9.3 Update (Combo).
4. Reinstall Lion/Mountain Lion, Mavericks: Reboot from the Recovery HD. Select Reinstall Lion/Mountain Lion, Mavericks from the Utilities menu, and click on the Continue button.
Note: You will need an active Internet connection. I suggest using Ethernet if possible because it is three times faster than wireless.
Reinstall the 10.9.3 update: OS X Mavericks 10.9.3 Update (Combo).

MacBook Pro won't start up after PRAM restart and a control/command restart

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