Macbook Pro won't boot after Yosemite upgrade

I downloaded Yosemite this evening, but the installation never finished. When I get past the login screen, a loading bar will half load before the computer shuts down. I tried command option p r without success, holding the option key down while starting only gives me the option of my main drive and it doesn't work. I tried holding down command r during start, but that doesn't do anything either. Any suggestions would be appriciated.

Reinstall Lion, Mountain Lion, Mavericks or Yosemite 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.
Reinstall Lion, Mountain Lion, Mavericks, or Yosemite
OS X Yosemite- Reinstall OS X
OS X Mavericks- Reinstall OS X
OS X Mountain Lion- Reinstall OS X
OS X Lion- 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.

Similar Messages

MacBook Pro won't boot after ram upgrade...

Hey everybody! Hope everyone is having a great Christmas! I got a 16gb ram upgrade for my 2012 MacBook Pro 15 today and I am having some trouble with the upgrade. Its an odd problem. I installed the two 8gb sticks no problem, but when I try and boot into OS X the machine shows the apple logo with the spinning wheel underneath, and then it just shuts itself off. I don't know what the problem is. The machine boots fine into my Windows 7 partition, and registers both sticks of ram. OS X restore also boots no problem and lets me reinstall OS X, which is what I am doing currently. IDK if this is just because of a hardare change or what. The ram I installed is Adata pc3 12800 1600mhz ram, so it should be supported.

Replace the Ram, buy from OWC or Crucial, buy the Ram Apple recommend, don't rely on "it should work"

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.

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 Firmware Update

So I just upgraded to a MacBook Pro which came in the mail yesterday. I removed the Apple-installed HD and swapped it out for a bigger, faster HD. I installed OS X from scratch, imported everything from my Time Machine backup during the Setup Assistant, and then started installing updates. Everything was running swimmingly until the last updates.
What happened is when I rebooted my MacBook Pro and logged in after a series of updates, I got presented with both a Bluetooth update and a Firmware update at the same time. Both required a restart so I thought I would kill two birds with one stone. I installed the Bluetooth update, and then when it asked to reset I installed the Firmware update instead. However, the firmware update didn't behave as advertised because instead of shutting the MacBook Pro completely down, it restarted and then started installing the firmware update.
Ever since the firmware update (which I think installed correctly but don't know how to verify), I cannot boot my MacBook Pro. Using the OS X install DVD I can view my firmware version using System Profiler, and the number it is reporting is MBP53.00A.B03.
I have tried booting in verbose mode to try and get a feel for the problem, and it eventually hangs on an infinite loop saying something about not being able to find something on disk0s2.
I also thought I would fix the problem by doing an Archive and Install, but it quit at the very beginning of installing with the error "unknown error".
Also I thought I would format the disk with Disk Utility and then try installing again, but Disk Utility reports that it in unable to unmount the volume.
Any help you can provide would be greatly appreciated. Thanks!
-- Update --
Remember how I'm unable to unmount the drive? I force unmounted it and then used Disk Utility to repair the volume, but still no luck.
I think the key to the problem is this new HD I put in runs at 3 Gbps. I think I read somewhere that the new MacBook Pro's don't support that.
I think next I should try swapping out the new HD in my MacBook Pro with the one it originally came with. What do you think?

I, too, have a brand new MBP 15" that I put an Intel X25 in. At the 1.5 (Prior to Firmware Update) setting, it worked fine. I rant the Firmware Update, all looked fine, but the drive is no longer able to be seen.
Flash the PRAM, per other suggestions to no avail. Boot off of the DVD and disk utility nor Profiler sees the drive.
Replace the drive with the stock that came with the MBP (which I had never even used) and it works.
Put the Intel X25 into a Windows machine and it works fine. Reformatted it (in windows) and put it back into my MBP. Still not able to see it (from the Disk utility after booting off the DVD).
Intel's firmware for the drive says its up-to-date (new drive) and if I attempt to "re-run" the Mac Firmware Update, it says that the machine is already up-to-date.
Seems odd that it worked before an now it doesn't. Also seems odd that the X25 works in other machines. And that my MBP works just fine with the stock Hitachi 7200 320GB drive.
Ideas? Intel says to call Apple Support. Not sure what I can say to them.

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 after Mountain lion upgrade

I bought the Mountian Lion upgrade and it installed fine on my MacBook Pro, and the machine worked fine yesterday. I performed a normal shutdown, and today it won't boot up. The Apple logo and the spinning pinwheel is all I get. Is there a known issue?

Welcome to Apple Support Communities
Press Command and R keys when your Mac starts and reinstall OS X. Mountain Lion is damaged in the computer

Macbook Pro won't start after Yosemite

(Posted this originally in the MacBook area, not seeing that it was the MacBook Pro area I should post. So reposting here. Sorry for confusion)
Hello all, and thank you for reading about my problem.
I have an old early 2008 MacBook. Ran fine, no problems, thing is a tank. I use it for my PhD dissertation. Last week I installed Yosemite on it, and it starts fine the first boot up, I get some work done and go to sleep. Typical night (other than putting the new OS on). The next morning, it won't start. At all.
When the power button is pressed it lights up for a second, the optical drive makes a bzzzt (typical start up noise) the fans start for a second and I heard the hard disk and then it IMMEDIATELY shuts down. Nothing from the screen at all. If I hold down the button, it lasts about 4 seconds before the front light blinks and then the computer goes dead again.
I've tried various combinations with the battery or AC power, used the hotkeys for the (PRAM reset, assuming it is on long enough to register), and waited several days for the battery to go down a bit. Nothing, it just refuses to start and I have no idea why. Nothing has happened to it, no drops, no water, no nothing at all between the time it was working fine, and the next day where it just does not work. Charge light and battery are both green and no problem there. Took out and reinserted the memory just in case as well.
Reset SMC/Tried SMC Bypass. No change.
Nothing, no effect at all.
I'm seriously worried. I've read a bit about the Nvida problem, but not sure if that is in play here. One time in the past it wouldn't start, but it seemed to just be some weird fluke or the battery, and after messing with it a bit, it started up again. A charge issue when it hit 0 charge.
The Apple store here in Japan is a nightmare to make an appointment for recently (probably all the bugs due to iOS and other problems, ugh). So I'm really hoping I'm just missing some possible fix. I can't imagine (and cannot even remotely afford) a fix or let alone a new computer as well. I almost wonder if Yosemite could have some sort of impact, even though it is software.
Please, any ideas? I'm desperate here...

Okay, I just got back from the Apple Store. I can't say I'm satisfied, but it went farther than I expected (although I admit I had rather low hopes).
They tested the computer and decided that yes, the logic board is damaged in some way. They admitted that there were numerous problems with my model. They both agreed that upgrading to Yosemite was the likely cause of pushing the computer over the limit and breaking the board (likely putting extra pressure on the computer).
The result? They offered a 5% discount if I were to buy a new mac at the Apple Store, and gave a new charger for a computer that doesn't work. Apparently, there are no more replacement boards from the US, and that is the maximum discount they can offer. I believe them, and the staff WAS extremely kind and considerate and sympathetic.
However, seriously, Apple you release an OS that kills a computer due to stress, and then offer 5% off on a new computer and that is acceptable? I don't think so... I'm a PhD student and struggling to get by, and I can't afford to just replace computers like paper plates when a new OS is released that isn't tested enough to NOT break older models that it is marked acceptable for.
Certainly unsatisfied right now, and I have a computer that I used for my dissertation that doesn't work. Will be contacting Apple customer service to try to argue that they need to take responsibility for this. I wasn't the only one at the Apple Store, and the guy next to me had immediately had his computer collapse right after Yosemite was installed.

My late 2011 Macbook Pro is running slow after Yosemite upgrade

Hello everyone! I'm a little desperate as this is my working computer and I'm not sure what else to do. I took it to a mac technician and they did a clean intall, checked my memory cards and said there should be no problem.
I get it home, install the basics programs I need for work- Adobe, Chrome, Firefox, iWorks. My computer is still running very slow. The start up is slow, the internet is very slow.
Here's my EtreCheck report. I hope maybe one of you can shine some light on the issue. Thank you in advance for all the help.
Problem description:
My computer is running very slow. Even the browser when switching between tabs will show a blank page for a few seconds before showing the actual page. It was rebooted and nothing. This problem started after upgrading to Yosemite.
EtreCheck version: 2.1.8 (121)
Report generated February 17, 2015 at 10:26:21 AM AST
Download EtreCheck from http://etresoft.com/etrecheck
Click the [Click for support] links for help with non-Apple products.
Click the [Click for details] links for more information about that line.
Hardware Information: ℹ️
    MacBook Pro (15-inch, Late 2011) (Technical Specifications)
    MacBook Pro - model: MacBookPro8,2
    1 2.2 GHz Intel Core i7 CPU: 4-core
    16 GB RAM Upgradeable
        BANK 0/DIMM0
            8 GB DDR3 1333 MHz ok
        BANK 1/DIMM0
            8 GB DDR3 1333 MHz ok
    Bluetooth: Old - Handoff/Airdrop2 not supported
    Wireless: en1: 802.11 a/b/g/n
    Battery Health: Normal - Cycle count 406
Video Information: ℹ️
    Intel HD Graphics 3000 - VRAM: 512 MB
    AMD Radeon HD 6750M - VRAM: 512 MB
        Color LCD 1440 x 900
System Software: ℹ️
    OS X 10.10.2 (14C109) - Time since boot: 0:48:10
Disk Information: ℹ️
    ST9500325ASG disk0 : (500.11 GB)
        EFI (disk0s1) <not mounted> : 210 MB
        Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
        Macintosh HD (disk1) / : 498.88 GB (446.78 GB free)
            Encrypted AES-XTS Unlocked Converting
            Core Storage: disk0s2 499.25 GB Online
    MATSHITADVD-R   UJ-8A8
USB Information: ℹ️
    Apple Inc. FaceTime HD Camera (Built-in)
    Logitech USB Receiver
    Apple Inc. BRCM2070 Hub
        Apple Inc. Bluetooth USB Host Controller
    Apple Inc. Apple Internal Keyboard / Trackpad
    Apple Computer, Inc. IR Receiver
Thunderbolt Information: ℹ️
    Apple Inc. thunderbolt_bus
Gatekeeper: ℹ️
    Mac App Store and identified developers
Launch Agents: ℹ️
    [not loaded]    com.adobe.AAM.Updater-1.0.plist [Click for support]
    [running]    com.adobe.AdobeCreativeCloud.plist [Click for support]
Launch Daemons: ℹ️
    [loaded]    com.microsoft.office.licensing.helper.plist [Click for support]
User Launch Agents: ℹ️
    [loaded]    com.adobe.AAM.Updater-1.0.plist [Click for support]
    [loaded]    com.google.keystone.agent.plist [Click for support]
User Login Items: ℹ️
    iTunesHelper    Application (/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)
    Dropbox    Application (/Applications/Dropbox.app)
Internet Plug-ins: ℹ️
    SharePointBrowserPlugin: Version: 14.3.8 - SDK 10.6 [Click for support]
    QuickTime Plugin: Version: 7.7.3
    AdobeAAMDetect: Version: AdobeAAMDetect 2.0.0.0 - SDK 10.7 [Click for support]
    Default Browser: Version: 600 - SDK 10.10
3rd Party Preference Panes: ℹ️
    None
Time Machine: ℹ️
    Time Machine not configured!
Top Processes by CPU: ℹ️
        10%    WindowServer
         5%    Google Chrome
         2%    fontd
         0%    Safari
         0%    launchservicesd
Top Processes by Memory: ℹ️
    1.07 GB    Safari
    261 MB    Google Chrome
    223 MB    Adobe Photoshop CC 2014
    189 MB    Pages
    120 MB    Dropbox
Virtual Memory Information: ℹ️
    9.85 GB    Free RAM
    4.81 GB    Active RAM
    747 MB    Inactive RAM
    1.76 GB    Wired RAM
    2.29 GB    Page-ins
    0 B    Page-outs
Diagnostics Information: ℹ️
    Feb 17, 2015, 09:45:40 AM    /Users/[redacted]/Library/Logs/DiagnosticReports/dynamiclinkmanager_2015-02-17- 094540_[redacted].crash
    Feb 17, 2015, 09:35:41 AM    Self test - passed
    Feb 16, 2015, 06:43:57 PM    /Library/Logs/DiagnosticReports/LegacyFileVaultMessageTracer_2015-02-16-184357_ [redacted].crash
    Feb 16, 2015, 06:26:39 PM    /Users/[redacted]/Library/Logs/DiagnosticReports/Core Sync_2015-02-16-182639_[redacted].crash

According to that report, it is still converting your encrypted disk:
Disk Information: ℹ️
    ST9500325ASG disk0 : (500.11 GB)
        EFI (disk0s1) <not mounted> : 210 MB
        Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
        Macintosh HD (disk1) / : 498.88 GB (446.78 GB free)
            Encrypted AES-XTS Unlocked Converting
            Core Storage: disk0s2 499.25 GB Online

Late 2011 MacBook Pro can't boot after Yosemite install

After installing Yosemite on this late 2011 MacBook Pro it stops about a third of the way into booting up. It displays a null sign. I can boot into recovery disk, or external HD (I don't have a backup of this system, but can boot from my MacBook Air's clone) if I use option-R or just option at startup. It won't go into Safe Mode. From the ext HD I have reinstalled Yosemite on the MBP, but it still freezes mid-boot. Disk Utility repair permissions, repair HD, zap PRAM, SMC, I've tried all of these (from reading advice here, and PM from Ogelthorpe). I have copied the Etre Report below. Suggestions?
EtreCheck version: 2.1.8 (121)
Report generated March 24, 2015 at 2:16:55 PM EDT
Download EtreCheck from http://etresoft.com/etrecheck
Click the [Click for support] links for help with non-Apple products.
Click the [Click for details] links for more information about that line.
Hardware Information: ℹ️
    MacBook Pro (13-inch, Late 2011) (Technical Specifications)
    MacBook Pro - model: MacBookPro8,1
    1 2.4 GHz Intel Core i5 CPU: 2-core
    4 GB RAM Upgradeable
        BANK 0/DIMM0
            2 GB DDR3 1333 MHz ok
        BANK 1/DIMM0
            2 GB DDR3 1333 MHz ok
    Bluetooth: Old - Handoff/Airdrop2 not supported
    Wireless: en1: 802.11 a/b/g/n
    Battery Health: Normal - Cycle count 431
Video Information: ℹ️
    Intel HD Graphics 3000
        Color LCD 1280 x 800
System Software: ℹ️
    OS X 10.10.3 (14D113c) - Time since boot: 0:25:56
Disk Information: ℹ️
    ST9500325ASG disk0 : (500.11 GB)
        EFI (disk0s1) <not mounted> : 210 MB
        Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
        Macintosh HD (disk1) /Volumes/Macintosh HD : 498.88 GB (345.40 GB free)
            Core Storage: disk0s2 499.25 GB Online
    MATSHITADVD-R   UJ-8A8
USB Information: ℹ️
    Apple Inc. FaceTime HD Camera (Built-in)
    Apple Inc. BRCM2070 Hub
        Apple Inc. Bluetooth USB Host Controller
    Apple Inc. Apple Internal Keyboard / Trackpad
    Western Digital My Book 1140 2 TB
        EFI (disk2s1) <not mounted> : 210 MB
        MBPClone (disk2s2) /Volumes/MBPClone : 249.35 GB (119.30 GB free)
        Recovery HD (disk2s3) <not mounted> [Recovery]: 784 MB
        Clone27iMac (disk2s4) /Volumes/Clone27iMac : 1.08 TB (918.40 GB free)
        Recovery HD (disk2s5) <not mounted> [Recovery]: 650 MB
        MediaorWhatever (disk2s6) / : 665.53 GB (583.65 GB free)
        Recovery HD (disk2s7) <not mounted> [Recovery]: 650 MB
    Apple Computer, Inc. IR Receiver
Thunderbolt Information: ℹ️
    Apple Inc. thunderbolt_bus
Gatekeeper: ℹ️
    Mac App Store and identified developers
Kernel Extensions: ℹ️
        /System/Library/Extensions
    [not loaded]    com.ricoh.print.kext.USBPrintClass (3.01) [Click for support]
        /Volumes/MBPClone/Applications/DiskWarrior.app
    [not loaded]    com.alsoft.Preview (4.4) [Click for support]
        /Volumes/MBPClone/Library/Sophos Anti-Virus/InterCheck.app
    [not loaded]    com.sophos.kext.sav (8.0.14 - SDK 10.5) [Click for support]
Launch Agents: ℹ️
    [loaded]    com.google.keystone.agent.plist [Click for support]
    [running]    net.culater.SIMBL.Agent.plist [Click for support]
Launch Daemons: ℹ️
    [loaded]    com.adobe.fpsaud.plist [Click for support]
    [loaded]    com.bombich.ccc.plist [Click for support]
    [running]    com.bombich.ccchelper.plist [Click for support]
    [loaded]    com.google.keystone.daemon.plist [Click for support]
    [loaded]    com.transcend.TSTRIMHandlerHelp.plist [Click for support]
User Launch Agents: ℹ️
    [loaded]    com.adobe.ARM.[...].plist [Click for support]
User Login Items: ℹ️
    iTunesHelper    Application (/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)
    WD Quick View    Application (/Library/Application Support/WDSmartware/WDQuickView.app)
Internet Plug-ins: ℹ️
    o1dbrowserplugin: Version: 5.40.2.0 - SDK 10.8 [Click for support]
    Default Browser: Version: 600 - SDK 10.10
    Flip4Mac WMV Plugin: Version: 2.3.2.6 [Click for support]
    OfficeLiveBrowserPlugin: Version: 12.3.6 [Click for support]
    AdobePDFViewerNPAPI: Version: 10.1.13 [Click for support]
    FlashPlayer-10.6: Version: 16.0.0.305 - SDK 10.6 [Click for support]
    Silverlight: Version: 4.0.50917.0 [Click for support]
    Flash Player: Version: 16.0.0.305 - SDK 10.6 Outdated! Update
    QuickTime Plugin: Version: 7.7.3
    googletalkbrowserplugin: Version: 5.40.2.0 - SDK 10.8 [Click for support]
    iPhotoPhotocast: Version: 7.0 - SDK 10.8
    AdobePDFViewer: Version: 10.1.13 [Click for support]
    Scorch: Version: 6.2.0 [Click for support]
    DirectorShockwave: Version: 12.0.7r148 - SDK 10.6 [Click for support]
3rd Party Preference Panes: ℹ️
    Flash Player [Click for support]
    Flip4Mac WMV [Click for support]
    Perian [Click for support]
    WDQuickView [Click for support]
Time Machine: ℹ️
    Mobile backups: OFF
    Auto backup: NO - Auto backup turned off
    Volumes being backed up:
    Destinations:
        MBP Backup [Local]
        Total size: 299.73 GB
        Total number of backups: 20
        Oldest backup: 2013-03-14 16:58:24 +0000
        Last backup: 2014-02-25 16:24:25 +0000
        Size of backup disk: Excellent
            Backup size 299.73 GB > (Disk size 0 B X 3)
Top Processes by CPU: ℹ️
         5%    WindowServer
         3%    mds
         0%    AppleSpell
         0%    fontd
         0%    mds_stores
Top Processes by Memory: ℹ️
    249 MB    mds_stores
    150 MB    Finder
    116 MB    Dock
    116 MB    Spotlight
    73 MB    ocspd
Virtual Memory Information: ℹ️
    801 MB    Free RAM
    1.59 GB    Active RAM
    785 MB    Inactive RAM
    1.09 GB    Wired RAM
    2.01 GB    Page-ins
    446 KB    Page-outs
Diagnostics Information: ℹ️
    Mar 24, 2015, 01:44:49 PM    Self test - passed
    Mar 22, 2015, 10:30:37 PM    /Library/Logs/DiagnosticReports/VideoMemoryTool_2015-03-22-223037_[redacted].cr ash

Drive Partition and Format
1. 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.
If you are preparing an external or a non-startup drive, then open Disk Utility in your Utilities folder.
2. After DU loads select your hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Note the SMART status of the drive in DU's status area. If it does not say "Verified" then the drive is failing or has failed and will need replacing. SMART info will not be reported on external drives. Otherwise, click on the Partition tab in the DU main window.
3. Under the Volume Scheme heading set the number of partitions from the drop down menu to one. Click on the Options button, set the partition scheme to GUID then click on the OK button. Set the format type to Mac OS Extended (Journaled.) Click on the Partition button and wait until the process has completed.
4. Select the volume you just created (this is the sub-entry under the drive entry) from the left side list. Click on the Erase tab in the DU main window.
5. Set the format type to Mac OS Extended (Journaled.) Click on the Security button, check the button for Zero Data and click on OK to return to the Erase window.
6. Click on the Erase button. The format process can take up to several hours depending upon the drive size.
7. Quit DU when it is finished and return to the installer. Install Snow Leopard. Download and install Mac OS X 10.6.8 Update Combo v1.1.

Macbook Pro is Not Booting After RAM Upgrade

Hi,
I just upgraded the RAM in my MacBook Pro running Mountain Lion from 4gb to 8gb (Using the memory that the guy at Fry's recommended). It has been stuck on the Apple logo for about 20 minutes after the upgrade, even after I made sure that the RAM was seated properly. Is it normal for it to take this long to boot after a RAM upgrade?

I installed 8gb (2 X4gb) and it has a maximum of 8gb. I have determined that it was just bad RAM, so I will return it as soon as I can.
Thanks.

Macbook pro doesn't boot after iOS upgrade

Hi all,
I've upgraded my macbook pro (was requested automatically the upgrade) and after reboot to finish the installation, my macbook doesn't boot up.
Is there any way to boot it up? A kind of boot in safe mode?
I'm trying to power it up but nothing. It doesn't boot at all.
Please, can you help me with this.
Thanks
Álvaro

iOS is for iPhone, iPad not for Mac. So what upgrade are you referring to?

Macbook pro won't boot after update to 10.6.8

Hi everyone,
Yesterday I bought an used macbook pro (15 inch early 2008). When looking at it, it was in good shape and the previous owner just did a fresh install of snow leopard. I took it home and whas happy with it. In the first two hours of using it, everything was fine. After installing the update to 10.6.8 my macbook needed to be shut down.. After shutting down it started up again but the screen stayed black. I had no idea why. So I rebooted it by pressing the power button. The same problem remained, it seemed to start up (I could hear the harddrive and fan) but it didn't boot into Mac Os. After a couple of attempts, it now shutsdown immediatly after pressing the powerbutton (3 seconds after). No chime or nothing.
At first I thought this would only be a software problem, because the problem started immediatly after updating. So I put in my snow leopard dvd to boot into that, but I can't even get it to boot into the install dvd. Because it shuts down immediatly after pressing the power button. Then I started suspecting an hardware failure, which would be a very big coincidence to show up immediatly after booting up. These are the things I have tried so far, to no avail:
- Plugging of the power cord and removing the battery, then pressing and holding the powerbutton for at least 5 sec
- Holding the option, command, P and R keys during boot.
- Replacing the memory
- Replacing the hard drive
- Unplugging the super drive
- Starting up holding the d key
At a certain point I was hoping that It would be an harddrive or memory problem. I replaced both with examples I know for sure they are working. But still the same problem; macbook shuts down almostimmedialty after pressing the power button.
There is no warrany anymore, and technical support would cost me 49 euros per incident.. to probably hear that the macbook is beyond repair. I feel i have just thrown away 300 euro's for an nightmare experience. Does anybody now anything to try, i'm really desperate here

After installing the update to 10.6.8
What update was that?
So I put in my snow leopard dvd to boot into that, but I can't even get it to boot into the install dvd.
Did the previous owner also give you the discs that originally came with the computer? Those are what you need to troubleshoot with. You also need disc 1 to run the Apple Hardware Test.
There is no warrany anymore, and technical support would cost me 49 euros per incident..
Apple Store and AASP diagnostic testings are free. Suggest that you take full advantage of it. This way you can find out exactly what is wrong with your computer. Post back here with the diagnosis and someone will post DIY repair sites.

Macbook Pro won't boot after update

I have a macbook pro3,1 (early 2008) that I received from someone else. When I received it, it had os x 10.8.3 installed. Initially I tried to update it to maverick, but after it rebooted it would not boot, just continued to reboot over and over. I then was able to boot into restore mode and do a repair on the disk. After that I was able to boot into 10.8.3.
I decided to update to 10.8.5, and received the same results as before. This time I was unable to restore with a disk repair.
I also created a bootable usb with Mavericks on it. Again, it will not boot to allow an install.
I was able to boot into safe mode, but that did not fix the installation. I tried repartitioning the hard drive and install mavericks on the new partition, but that failed also.
After looking at the logs, I see that there is a kernel panic that happens. Everytime I boot normally, it seems to get just before the login screen before it reboots. Below is the log.
Sat May 31 19:34:08 2014
panic(cpu 0 caller 0xffffff7f881ad8a1): NVRM[0/1:0:0]: Read Error 0x00003250: CFG 0xffffffff 0xffffffff 0x92000000, BAR0 0x92000000 0xffffff804e3b5000 0x084700a2, D0, P2/4
Backtrace (CPU 0), Frame : Return Address
0xffffff804e00b590 : 0xffffff8007a1d636
0xffffff804e00b600 : 0xffffff7f881ad8a1
0xffffff804e00b6c0 : 0xffffff7f88512849
0xffffff804e00b700 : 0xffffff7f884f6480
0xffffff804e00b740 : 0xffffff7f884f9567
0xffffff804e00b8a0 : 0xffffff7f88272911
0xffffff804e00ba20 : 0xffffff7f882ffd5a
0xffffff804e00bc60 : 0xffffff7f882fb64d
0xffffff804e00bd70 : 0xffffff7f882ff530
0xffffff804e00bdc0 : 0xffffff7f8856a0eb
0xffffff804e00bdf0 : 0xffffff7f882ff149
0xffffff804e00be70 : 0xffffff7f88192afa
0xffffff804e00bf30 : 0xffffff7f881526ec
0xffffff804e00bf60 : 0xffffff8007a3e26e
0xffffff804e00bfb0 : 0xffffff8007ab3257
      Kernel Extensions in backtrace:
         com.apple.NVDAResman(8.1.6)[39D35403-42FB-3F08-999C-9866938D6B3A]@0xffffff7f881 4c000->0xffffff7f883effff
            dependency: com.apple.iokit.IOPCIFamily(2.8)[6C1D646D-7E5E-3D7F-A557-2CBA398FF878]@0xffffff 7f880b2000
            dependency: com.apple.iokit.IONDRVSupport(2.3.7)[F16E015E-1ABE-3C40-AC71-BC54F4BE442E]@0xff ffff7f88138000
            dependency: com.apple.iokit.IOGraphicsFamily(2.3.7)[9928306E-3508-3DBC-80A4-D8F1D87650D7]@0 xffffff7f880f5000
         com.apple.nvidia.nv50hal(8.1.6)[BF3CC142-4112-3E23-BCE2-CDCFD5811DDA]@0xffffff7 f883fb000->0xffffff7f886cefff
            dependency: com.apple.NVDAResman(8.1.6)[39D35403-42FB-3F08-999C-9866938D6B3A]@0xffffff7f881 4c000
            dependency: com.apple.iokit.IOPCIFamily(2.8)[6C1D646D-7E5E-3D7F-A557-2CBA398FF878]@0xffffff 7f880b2000
BSD process name corresponding to current thread: kernel_task
Mac OS version:
12F45
Kernel version:
Darwin Kernel Version 12.5.0: Sun Sep 29 13:33:47 PDT 2013; root:xnu-2050.48.12~1/RELEASE_X86_64
Kernel UUID: EA38B02E-2B88-309F-BA68-1DE29F605DD8
Kernel slide:     0x0000000007800000
Kernel text base: 0xffffff8007a00000
System model name: MacBookPro3,1 (Mac-F4238BC8)
System uptime in nanoseconds: 79475358847
last loaded kext at 57319258564: com.apple.driver.AudioAUUC          1.60 (addr 0xffffff7f89b42000, size 28672)
loaded kexts:
org.tgwbd.driver.NullCPUPowerManagement          1.0.0d2
com.apple.driver.AudioAUUC          1.60
com.apple.driver.AppleHWSensor          1.9.5d0
com.apple.iokit.IOBluetoothSerialManager          4.1.7f4
com.apple.filesystems.autofs          3.0
com.apple.driver.AppleHDAHardwareConfigDriver          2.4.7fc4
com.apple.driver.AppleTyMCEDriver          1.0.2d2
com.apple.driver.AppleHDA          2.4.7fc4
com.apple.driver.AppleSMCPDRC          1.0.0
com.apple.iokit.IOUserEthernet          1.0.0d1
com.apple.Dont_Steal_Mac_OS_X          7.0.0
com.apple.driver.ApplePolicyControl          3.4.5
com.apple.driver.ACPI_SMC_PlatformPlugin          1.0.0
com.apple.driver.AppleLPC          1.6.3
com.apple.driver.SMCMotionSensor          3.0.3d1
com.apple.iokit.IOBluetoothUSBDFU          4.1.7f4
com.apple.iokit.BroadcomBluetoothHostControllerUSBTransport          4.1.7f4
com.apple.driver.AppleSMCLMU          2.0.3d0
com.apple.driver.AppleSMBusPCI          1.0.11d1
com.apple.GeForce          8.1.6
com.apple.driver.AppleUpstreamUserClient          3.5.12
com.apple.nvidia.NVDAStartup          8.1.6
com.apple.driver.AppleMuxControl          3.4.5
com.apple.driver.AppleBacklight          170.3.5
com.apple.driver.AppleMCCSControl          1.1.11
com.apple.driver.AppleUSBTCButtons          237.1
com.apple.driver.AppleUSBTCKeyEventDriver          237.1
com.apple.driver.AppleUSBTCKeyboard          237.1
com.apple.driver.AppleIRController          320.15
com.apple.driver.AppleFileSystemDriver          3.0.1
com.apple.AppleFSCompression.AppleFSCompressionTypeDataless          1.0.0d1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib          1.0.0d1
com.apple.BootCache          34
com.apple.iokit.SCSITaskUserClient          3.5.6
com.apple.driver.XsanFilter          404
com.apple.iokit.IOAHCIBlockStorage          2.3.5
com.apple.driver.AppleUSBHub          635.4.0
com.apple.driver.AirPortBrcm43224          600.36.17
com.apple.iokit.AppleYukon2          3.2.3b1
com.apple.driver.AppleFWOHCI          4.9.9
com.apple.driver.AppleAHCIPort          2.6.6
com.apple.driver.AppleIntelPIIXATA          2.5.1
com.apple.driver.AppleUSBEHCI          621.4.6
com.apple.driver.AppleUSBUHCI          621.4.0
com.apple.driver.AppleSmartBatteryManager          161.0.0
com.apple.driver.AppleRTC          1.5
com.apple.driver.AppleHPET          1.8
com.apple.driver.AppleACPIButtons          1.8
com.apple.driver.AppleSMBIOS          1.9
com.apple.driver.AppleACPIEC          1.8
com.apple.driver.AppleAPIC          1.7
com.apple.nke.applicationfirewall          4.0.39
com.apple.security.quarantine          2.1
com.apple.driver.AppleIntelCPUPowerManagement          214.0.0
com.apple.iokit.IOSerialFamily          10.0.6
com.apple.kext.triggers          1.0
com.apple.driver.DspFuncLib          2.4.7fc4
com.apple.iokit.IOAudioFamily          1.9.2fc7
com.apple.kext.OSvKernDSPLib          1.12
com.apple.iokit.IOFireWireIP          2.2.5
com.apple.driver.AppleHDAController          2.4.7fc4
com.apple.iokit.IOHDAFamily          2.4.7fc4
com.apple.iokit.IOSurface          86.0.4
com.apple.iokit.IOBluetoothFamily          4.1.7f4
com.apple.driver.IOPlatformPluginLegacy          1.0.0
com.apple.driver.IOPlatformPluginFamily          5.4.1d13
com.apple.iokit.IOBluetoothHostControllerUSBTransport          4.1.7f4
com.apple.driver.AppleSMC          3.1.5d4
com.apple.nvidia.nv50hal          8.1.6
com.apple.NVDAResman          8.1.6
com.apple.driver.AppleGraphicsControl          3.4.5
com.apple.driver.AppleBacklightExpert          1.0.4
com.apple.iokit.IONDRVSupport          2.3.7
com.apple.driver.AppleSMBusController          1.0.11d1
com.apple.iokit.IOGraphicsFamily          2.3.7
com.apple.driver.AppleUSBMultitouch          237.3
com.apple.iokit.IOUSBHIDDriver          623.4.0
com.apple.driver.AppleUSBMergeNub          621.4.6
com.apple.iokit.IOSCSIBlockCommandsDevice          3.5.6
com.apple.iokit.IOUSBMassStorageClass          3.5.2
com.apple.driver.AppleUSBComposite          621.4.0
com.apple.iokit.IOSCSIMultimediaCommandsDevice          3.5.6
com.apple.iokit.IOBDStorageFamily          1.7
com.apple.iokit.IODVDStorageFamily          1.7.1
com.apple.iokit.IOCDStorageFamily          1.7.1
com.apple.iokit.IOATAPIProtocolTransport          3.5.0
com.apple.iokit.IOSCSIArchitectureModelFamily          3.5.6
com.apple.iokit.IOUSBUserClient          630.4.4
com.apple.iokit.IO80211Family          530.5
com.apple.driver.AppleEFINVRAM          2.0
com.apple.iokit.IONetworkingFamily          3.0
com.apple.iokit.IOFireWireFamily          4.5.5
com.apple.iokit.IOAHCIFamily          2.5.1
com.apple.iokit.IOATAFamily          2.5.1
com.apple.driver.AppleEFIRuntime          2.0
com.apple.iokit.IOUSBFamily          635.4.0
com.apple.iokit.IOHIDFamily          1.8.1
com.apple.iokit.IOSMBusFamily          1.1
com.apple.security.sandbox          220.3
com.apple.kext.AppleMatch          1.0.0d1
com.apple.security.TMSafetyNet          7
com.apple.driver.DiskImages          345
com.apple.iokit.IOStorageFamily          1.8
com.apple.driver.AppleKeyStore          28.21
com.apple.driver.AppleACPIPlatform          1.8
com.apple.iokit.IOPCIFamily          2.8
com.apple.iokit.IOACPIFamily          1.4
com.apple.kec.corecrypto          1.0
I received the macbook from someone else without installation disks. Also, when try to do a re-install of 10.8.3 from the internet in restore mode, it tells me that the account does not match the one the purchase was made from. I would rather not run 10.8.3 anyway if I could install mavericks.
Below is the system information for the macbook
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:          2 GB
Bus Speed:          800 MHz
Boot ROM Version:          MBP31.0070.B07
SMC Version (system):          1.16f11
Serial Number (system):          W87422HUYAM
Hardware UUID:          00000000-0000-1000-8000-001B63A5B553
I have tried to reset nvram as well as smc with no result.
I have also done a extended apple hardware test which found no errors.
The macbook does have a bad battery, so I have tried booting without the battery. The results did not change.
I have searched the internet for the kernel panic error and can not find a consistent issue for macbook pros. Some say it is a hardware problem. Others say it is an install problem. What does not make sense to me is if it is hardware problem, why was I able to restore it back once and get it to boot consistently. It seems to be directly the result of updating the software.
I also read that 10.8.5 consistently had boot problems upon install, so I tried re-installing the combo update for 10.8.5
I feel like I have exhausted almost all the resources except taking it to the genius bar.
Please let me know if you can help.
Thanks,

bereanmh,
since your MacBook Pro didn’t originally have Mountain Lion installed at the factory, the former owner erred in leaving it on its internal disk when transferring it to you; Mountain Lion is non-transferable when sourced from the Mac App Store. The former owner should rather have provided you with its original pair of grey installation discs, which hold its original version of Mac OS X, its iLife apps, and its model-specific Apple Hardware Test. If you didn’t receive these discs, you can contact Apple directly to purchase a replacement pair. (They’re not available in Apple stores.)
That being stated, regarding the panic report above, the prime suspect is that NullCPUPowerManagement kernel extension — try uninstalling it to see if that makes a difference.

Macbook Pro Won't Boot After Starting Lion Install

2008 Macbook Pro 17" with Core 2 Dou processor.
Internal Disk has two Partitions
Downloaded Lion from App store and ran installer. Selected 2nd partition which is Mac OS Extended Journaled. (I was intending to do a clean install on this empty partition.)
Installs appears normal, goes to boot and hangs at the gray screen after the chime.
Verbose logging does not show anything obvious, no more info after identifying the network adaptors.
Booting with option key does not give option to boot to Snow Leopard partition.
I

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