Software Update Interrupted... now my MacBook Pro won't boot

I'm not really sure what happened. I was installing the 10.5.5 software update, as well as a few other things using Software Update and got to the point when I had to restart my computer. So I tell the computer to restart and then wander off for a minute or two.
When I came back the computer was off, I was gone for barely two minutes, so I know that the updates hadn't installed and I'm assuming something happened to interrupt the install. But now the machine doesn't boot at all.
I get the gray screen with the Apple symbol, and then the computer freezes at as light blue colored screen. Can't use the mouse or anything, not even a "beachball of death" as it were.
I have no idea what to do, I'm using my Windows partition right now. Any suggestions?

Or maybe simply by booting off your MacOS Install Disk and "updating MacOS" (sometimes you can "update" your MacOS with the install CD, if you're on the same version ...
Otherwise you could need to reinstall MacOS (hard but better than a piece of steel ...)

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I erased my hard drive and now my Macbook pro won't boot

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Are you sure it came with Lion?
Check out the support page for what build shipped with which OS.
PJRS

Kernel panic and now my MacBook Pro won't boot

My MacBook Pro had been acting a little strange for a while - sometimes applications like Final Cut Express and iTunes would "unexpectedly quit" when I tried to open them and wouldn't work until after a restart. Now, the screen went dim and I got the "you need to restart your computer" message. I did, and it worked for a few minutes, and did it again. Now all it does when I turn it on is chimes, shows the Apple logo as if it is going to start up, and then dies. It is the original Core Duo one so it's out of warranty. Is this the logic board? If not is there any hope of it working again?

Kernel panics are usually cause by hardware problems. Disconnect all devices from your computer & check out the following KB Article & User Tip:
http://docs.info.apple.com/article.html?artnum=106805 Mac OS X: "Broken folder" icon, prohibitory sign, or *kernel panic when computer starts*
User Tips: Kernel Panics
!http://i50.tinypic.com/izvwo1.gif!

I've updated to yosemite from Mavericks, but since i can't connect to the internet I used my time machine back up which was march 2013. Now my macbook pro won't start and ends with a prohibited ted sign. Any suggestions pls.

I've updated to yosemite from Mavericks, but since i can't connect to the internet I used my time machine back up which was march 2013. Now my macbook pro won't start and ends with a prohibted sign. Any suggestions pls.

Install or Reinstall Yosemite, Mavericks, Mountain Lion, or Lion from Scratch
Be sure you backup your files to an external drive or second internal drive because the following procedure will remove everything from the hard drive.
How to Clean Install OS X Yosemite
OS X Mavericks- Erase and reinstall OS X
OS X Mountain Lion- Erase and reinstall OS X
OS X Lion- Erase and reinstall Mac OS X
Note: You will need an active Internet connection. I suggest using Ethernet if possible
because it is three times faster than wireless.

MacBook Pro won't boot up after interruption of update

I interrupted the installation for the OS X Mountain Lion v10.8.2 and now my MacBook Pro will not boot up. Any suggestions besides calling Apple support or going to the store?

Hi,
I am having the same problem with my Macbook Pro. Did you manage to find a solution to this problem?

Macbook pro won't boot after installing update 10.9.3

macbook pro won't boot after installing update 10.9.3

Please read this whole message before doing anything.
This procedure is a diagnostic test. It’s unlikely to solve your problem. Don’t be disappointed when you find that nothing has changed after you complete it.
The purpose of the test is to determine whether the problem is caused by third-party software that loads automatically at startup or login, by a peripheral device, by a font conflict, or by corruption of the file system or of certain system caches.
Disconnect all wired peripherals except those needed for the test, and remove all aftermarket expansion cards, if applicable. Start up in safe mode.
Note: If FileVault is enabled, or if a firmware password is set, or if the startup volume is a Fusion Drive or a software RAID, you can’t do this. Ask for further instructions.
Safe mode is much slower to start up and run than normal, with limited graphics performance, and some things won’t work at all, including sound output and Wi-Fi on certain models. The next normal startup may also be somewhat slow.
The login screen appears even if you usually login 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.
Test while in safe mode. Same problem?
After testing, restart as usual (not in safe mode) and verify that you still have the problem. Post the results of the test.

I installed the 829mb Apple software update on my 2011 Macbook Pro. Upon restart, it crashed. Error message: Panic CPU 0 caller 0xffffff800064ba7b Unable to find driver for this platform \"acpi"\\n"@/sourcecache/xnu/xnu-1699.26.8/iokit/kernel/10platfor

I installed the 829mb Apple software update on my 2011 Macbook Pro. Upon restart, it crashed. It instructed me to hold power button to shut off and then press again to restart. Same error message keeps coming up and computer won't boot to home screen.
Error message:
Panic CPU 0 caller 0xffffff800064ba7b Unable to find driver for this platform \"acpi"\\n"@/sourcecache/xnu/xnu-1699.26.8/iokit/kernel/10platform
\"acpi"\\n"@/sourcecache/xnu/xnu-1699.26.8/iokit/kernel/10platformexpert.cpl:150 4
Debugger called panic
Kernal uuid a8ed611fb0f-3729-8392-e7a32c5e7d74
THANKS FOR ANY HELP.
ROBB

Boot into Recovery by holding down the key combination command-R at the startup chime. Release the keys when you see a gray screen with a spinning dial.
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 networks that require any kind of authentication other than a WPA or WPA2 Personal password.
When the Mac OS X Utilities screen appears, follow the prompts to reinstall the Mac OS. 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, so make a note of those before you begin.
Don't install the Thunderbolt update -- it's defective.

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.

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!!!

I recently did a full reinstall from my time machine and now my MacBook pro won't back up to the time machine. It starts a full backup ignoring the original back up, can anyone help?

I recently did a full reinstall from my time machine and now my MacBook pro won't back up to the time machine. It starts a full backup ignoring the original back up, can anyone help?

Did you follow the instructions on the page linked below?
OS X Yosemite: Recover your entire system

MacBook Pro won't boot after trying to install 10.7.3 update. Start up stalls at Apple logo and spinning gear.

MacBook Pro won't boot after trying to install 10.7.3 update. Start up stalls at Apple logo and spinning gear. Computer won't even start in safe mode.

My daughter's MacBook Pro was doing exactly the same thing. I don't know if it had anything to do with the latest update. She called me about a week ago saying that her MacBook began running slower by the day . She then called me Friday and told me that it wouldn't get past the gray screen and the gear just kept on spinning. I did everything I could over the phone including Safe mode which it wouldn't go into and thought maybe it was the hard drive. She took it to the Apple store. Originally, they also thought it was the hard drive. It ended up being a corrupted operating system (Lion). Apple genius simply re-installed Lion and she's back up and running. Good thing she backed up right before it crapped out. She'll be restoring everything tonight. Don't know if re-installing Lion will help your situation, but it did the trick for my daughter.

MacBook Pro won't boot after 10.6.8 update.

I completely erased my hard drive, reinstalled Snow Leopard and updated to 10.6.7. I then performed an Apple Hardware Test and verified the disk using disk utility. Both tests were successful. I then updated to 10.6.8 using the combo update and restarted my MacBook Pro. The boot process ran fine until the system locked up on the bright blue screen. No peripherals were connected to the laptop during this process. I powered the laptop down using the power button and turned it on again. This time, I entered verbose mode. The last line of text that I see before the screen turns black is "[ PCI configuration begin ]". Can anyone assist me with this issue?
My System Profile is as follows.
Hardware Overview:
Model Name:          MacBook Pro
Model Identifier:          MacBookPro3,1
Processor Name:          Intel Core 2 Duo
Processor Speed:          2.4 GHz
Number Of Processors:          1
Total Number Of Cores:          2
L2 Cache:          4 MB
Memory:          3 GB
Bus Speed:          800 MHz
Boot ROM Version:          MBP31.0070.B07
SMC Version (system):          1.16f11
Serial Number (system):          System Serial#
Hardware UUID:          00000000-0000-1000-8000-001B639863A4
Sudden Motion Sensor:
State:          Enabled

Might be time to replace the PRAM battery. That's not the normally accessible battery, but it is one that often fails after 4 years.

Macbook pro won't boot, stuck on white apple screen

Noticed today, that my macbook pro won't boot . It gets to the white apple screen with the spinner under the apple logo. It stays like this for a long time without doing anything except spinning.
I've powered down and tried to boot up several times.
I have boot camp and windows on my mac and when the white screen appears, I can press Option to bring up which hard drive and the Windows partition will load without any problems.

Exacty what happens when you try to boot up from the disc that came with your computer? Are you holding down the c key? Have you tried holding down the "option key?" Are you able to run the Hardware Test - Intel-based Macs: Using Apple Hardware Test
Shut down your computer and disconnect all peripherals (keyboard & mouse if pertinent) from your computer. Now reboot.
If the Mac starts up normally, shut it down again and then plug in one of the peripherals (keyboard or mouse first) and start up your computer again. If it does so successfully repeat the process, adding one peripheral at a time until your Mac acts up. At that point, disconnect the last peripheral you added, reboot your Mac and search the peripheral vendor's website for an updated driver.
If no driver exists or the problem remain after installing the new driver, try a different cable or a different port on your Mac.
If none of the above works, again disconnect all peripherals from your Mac, hold down the "shift" key to start up in "Safe Boot" mode.
If the Mac starts up correctly, restart without pressing the "shift" key.
If your computer still does not start up properly, shut it down and restart it while holding down the Apple+Option-P-R keys; keep holding "all 4 keys" down until you hear the startup sound "twice."
If none of the above work Disconnect all peripherals from your computer. Boot from your install disc & run Repair Disk from the utility menu. To use the Install Mac OS X disc, insert the disc, and restart your computer while holding down the C key as it starts up.
Select your language.
Once on the desktop, select Utility in the menu bar.
Select Disk Utility.
Select the disk or volume in the list of disks and volumes, and then click First Aid.
Click Repair Disk.
(If Disk Utility cannot repair, you will need a stronger utility (3rd party) - Diskwarrior or Techtool PRO)
Restart your computer when done.
Repair permissions after you reach the desktop-http://docs.info.apple.com/article.html?artnum=25751 and restart your computer.
Remove any 3rd party ram.
Reinstall Lion - This will install a "fresh" copy of Lion without archiving old system files but leaves the rest of your files in place.
If your computer is still under warranty or you have Apple Care, take full advantage of it by letting tech support deal with your problems. It's what you're paying them for.
Out of warranty - take the computer to an Apple store or an AASP. Whichever is more convenient for you.

Macbook Pro won't boot or show partition

I have my macbook pro partitioned with leopard and tiger (for protools) . I also have a copy of leopard on an external hard drive that I boot to occasionally. While on this external drive I had to do a manual shutdown after it froze and now my macbook pro won't show the internal drive partition with leopard on it. It will only boot to the internal partition with tiger on it. Even though I can see the leopard partition on the desktop and access it through tiger it is still not showing up in startup disk. I held the option key during startup and it gave me the choice to choose the leopard partition but after it started to go through booting it would then shut down.
Any suggestions?
I ran disk permissions and repair but its said everything is okay.

I would try Diskwarrior 4.1 and see if that can repair the drive.
btw how did you get Tiger on your Macbook Pro?
My Tiger install DVD will not install on my Macbook pro even though it is a 3.1 version machine.
I need to run Protools as well.

HT4718 I recently upgrade my OS and now my MacBook Pro will not boot up

I recently upgrade my OS and now my MacBook Pro will not boot up

Reinstall Lion, Mountain Lion, or Mavericks without erasing 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
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 then click on the Repair Permissions button. When the process is completed, then quit DU and return to the main menu. Select Restart from the Apple menu.
Reinstall Mountain Lion or Mavericks
OS X Mavericks- Reinstall OS X
OS X Mountain Lion- Reinstall OS X
Note: You will need an active Internet connection. I suggest using Ethernet
if possible because it is three times faster than wireless.

Software Update Interrupted... now my MacBook Pro won't boot

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