MBP won't boot; goes to DARWIN

My Macbook Pro won't boot. It takes me to Darwin and tells me that 'couldn't set up diskarb session'.
I tried running disk utility by making it the target disk to my macbook and it told me that nothing is wrong.
I ran Apple hardware test from the DVD and it says no problems.
I'm at a loss.
Help please.
Carlos

> It takes me to Darwin and tells me that 'couldn't set up diskarb session'
OK try entering:
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")
mount -uw
autodiskmount -va (This is the key command)
diskutil repairPermissions /
When all looks OK
reboot

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Raj wrote:
That is not the reason it didn't work. Here is the actual clarity:
*A retail Leopard DVD should be able to boot a new Macbook Pro unibody.*
So you are saying even if the driver for the controller on which the DVD drive sits is not available in the Leopard DVD you are using because the hardware was not manufactured at the time the Leopard release on the DVD was made, the OS should magically just boot? How is that possible? Unibody MacBook Pros have entirely NEW AHCI chipset - for which there won't be any drivers on the older Leopard DVD and as such the DVD wont be detected once the OS on the DVD loads. In cases where the chipset used is same (as in previous generations of MBP) it will boot.
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The OP said that his computer boots from the DVD that came with the computer - just not with the old retail Leopard DVD. Also - what should happen if the new hardware happens to be the controller on which the DVD drive is sitting? How will it be able to read the DVD? What about the graphics card? If the drivers on the old leopard disk do not recognize the new graphics card - how is the OS going to display on screen?
On my way home, I stopped at a Mac store and asked them to test this. They successfully booted a new Macbook Pro unibody from an older Leopard DVD. And this is why Apple is replacing my computer, because it is a hardware issue, not a software one.
Again - you fail to understand that whether or not the old DVD boots on a new machine all depends on how much hardware has changed and what hardware has changed. It may boot on some generation of machine because the basic chipset and graphics did not change or were handled generically by the drivers on the older DVD but it may totally refuse to boot on new gen machine which has totally different / incompatible hardware.
So your claim that any old Leopard DVD must continue to boot on any new machine is not really technically explainable.

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alphaflight wrote:
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mike2016 wrote:
This happened after I downloaded and installed some updates from Apple. I don't know if the updates would cause this or it's something else. Now when it boots, there's a loading bar under the Apple logo, it loads half way and shuts down itself.
A stopped loading bar is indicative of a failed firmware install that didn't complete, it's trying to install and is failing.
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Reboot into Safe Mode, (shift key down) then reboot normally and see if that fixes the issue.
https://support.apple.com/kb/TS2570
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Find your exact firmware(s) here (or on Apple Downloads page)
https://support.apple.com/kb/HT1237
Apply instructions here
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Try this
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Check the format of your replacement drive. Verify that is was formatted as GUID. Often times the drives are formatted to the older scheme. It must be a GUID partition scheme to be bootable with an Intel Mac.

My MBP won't boot!

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when you say "low-level" reformat what exactly do you
When booted from your install DVD and have Disk Utility open, select "Zero out data" under Security Options. Note: This may take hours to complete before you can start the install.
Here is a video on it: http://macosg.me/2/4y
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Old MBP won't boot, not even Target disk mode

Hi all,
My 2009 MacBook Pro was being used by a student to prepare some material for me while I worked on my new(ish) Retina MBP. The system was sluggish, despite numerous attempts to use disk repair on it, throw out unused programs, etc. It finally got so slow (we were scanning large files, and even the attempt to open Finder on a directory with the large files would cause it to freeze) that we re-installed the operating system. That didn't help, so we reformatted the disk (losing a lot of work) and started again. Things were working just fine (although it was getting slower again) and then out of the blue it would not boot.
We tried everything: Safe boot, single user, resetting *RAM, the whole kit and kaboodle.
We then set it us as a Target disk - and were happy to see some files. But happiness was only short lived. Two files could be copied before the disk refused to continue, noting errors. We turned it off and back on in Target mode - the firewire symbol appears, but it is not seen in the Finder. The disk utility can see it, but as soon as we try to verify or repair it, it disappears.
I've tried connecting it to a Windows machine - it dings, but does not appear. I've tried booting with the Install CD (won't move), I've tried booting with Linux (I get an error). Every now and then after a looooong time, it gets mounted as a Target disk. I've managed to scrape 3 (three) files from the disk, it is soon unresponsive, and then it won't mount again. Every now and they I can use the disk utility to access the disk, verify says I need to repair it, repair says I need to re-format the disk. I've done that a few weeks ago.
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You have a hardware problem. Probably the drive has failed. But if the system does not turn on at all, no sounds of any kind, then the problem is more serious. Like the logic board has failed.
Connecting a mac hard drive to a windows system wouldn't work unless you have a program that will allow windows to read mac formatted drives. Windows can't do that itself. You need something like macdrive (I think it is called) or some other program that can read mac formatted drive on a windows pc.
But from reading your whole post the drive has completely failed. If the system still starts up, you hear the startup chime, all you have to do is replace the failed hard drive and reinstall the os and program to get the system working again.

MBP won't boot - Grey Apple Screen, Spinning Wheel, then Shut Down

Help please
For no apparent reason, my otherwise well-working MBP (2007 model) simply won't log in to OSX (leopard). I try to boot it up, and I get the grey screen with the Apple logo, the spinning progress wheel, and then after about 4 minutes, it just powers off.
Thoughts?

adammabry wrote:
I ran verify because the option to run repair was not available.
And just to make sure, you booted from the install disc? (Repair Disk is never available when booted on the boot volume of the HD.)
Here's a follow up... This mac wasn't doing it's airport backups properly,
I'm not quite sure what that means, maybe Time Machine? Time Capsule?
so I don't have a recent back up of the files. Would you suggest just sending the computer to a data recovery service?
Very expensive. Try FireWire Target Disk Mode first. If that doesn't work, I'd remove the HD, install it in an external enclosure (as low as $15) and see if it will boot the MBP or the data is accessible from another Mac.
Do you think I can just pop a new HD in it and it'll work fine under a full reinstall?
Doing my previous suggestions first may help to answer that. If there's absolutely nothing wrong with the HD, then that isn't the issue. If there is something wrong with it, likely a new HD is the fix.

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Any help or suggestions would be greatly appreciated. I looked through the support files and threads but could not find anything about this.
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Thanks guys. I need to get a firewire>firewire cable. I'll boot into target mode and backup my home folder.
What about re-installing the OS with the option of preserving the previous settings and user account. Would I be able to access my old applications or just the files? I was considering reformatting anyway because of all the "crap" I've loaded on over the year.
Rregardless I will try target mode first and let you know.
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MBP won't boot; goes to DARWIN

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