Can't boot into Mac Partition

I started out with a simple error in iTunes whenever I tried to update my genius. The error was the following:
"We could not complete your iTunes Store request. An unknown error occured (-9812). There was an error in the iTunes Store. Please try again later."
I read on apples support page http://support.apple.com/kb/TS3222 that I needed to delete my VeriSign certificates. However, there were no certificates in the "login" section of my keychain, only in the "system root" section. I tried to delete the root Verisign Certificates but couldn't.
Next I read that I could clear my cache and that would help, so I cleared my system cache and deleted my cookies in Safari. Didn't help.
So I reset my login keychain several times and nothing happened. I decided to restart my computer, and I was able to access the login screen. However, when I entered my username and password they didn't work so I couldn't log into my account.
Since I have a windows partition, I booted up into windows and downloaded a program called MacDrive 8. I looked in my keychain folder under /Users/username/Library/Keychains and discovered that I had several "login.keychain" files. The first was named "login.keychain", the others were named "loginrenamed1.keychain", "loginrenamed2.keychain", and "loginrenamed3.keychain".
Other files in the folder were "MicrosoftIntermediateCertificates" and ".fl62323D2F" and ".flA6A9AF81" in case you needed to know.
I decided to copy the three "loginrenamed#.keychains" to my desktop (and remove them from the keychain folder) and then reboot. This is where my major problem started. I received an error on the white screen with the apple logo on it. It said "You need to restart your computer. Hold down the Power button until it turns off, then press the Power button again". I did and it came up with the same error.
I logged back into the windows partition (by holding down "option" at the startup screen and selecting my windows drive) and put the renamed keychains back in their original folder. However, when I rebooted onto mac partition I get the same error at the startup screen, even though I placed the renamed keychain files back into their original folder.
This is the error:
npvhash=4095
PAE enabled
64 bit mode enabled
Darwin Kernal Version 10.4.0: Fri Apr 23 18:28:53 PDT 2010; root:xnu-1504.7.4~1/RELEASE_I386
vmpagebootstrap: 906786 free pages and 7625 wired pages
standard timeslicing quantum is 10000 us
migtable_maxdispl = 73
Kext com.apple.driver.AppleACPIPlatform - library kext com.apple.kpi.mach not found
Can't load kext com.apple.driver.AppleACPIPlatform - failed to resolve library dependencies
Kext com.apple.driver.AppleACPIPlatform failed to load (0xdc00800e).
Failed to load kext com.apple.driver.AppleACPIPlatform (error 0xcd00800e).
Couldn't alloc class "AppleACPIPlatformExpert"
panic(cpu 0 caller 0x5591db): "Unable to find driver for this platform: \"ACPI\".\n"@/SourceCache/xnu/xnu-1504.7.4/iokit/Kernal/IOPlatformExpert.cpp:13 89
Debugger called: <panic>
Backtrace (CPU 0), Frame : Return Address (4 potential args on stack)
0x509cbda8 : 0x21b455 (0x5cf328 0x509cbddc 0x2238b1 0x0)
0x509cbdf8 : 0x5591db (0x5d8c04 0x6a0f4d0 0x509cbe28 0x6a84f80)
0x509cbe18 : 0x538e50 (px6b8c180 0x6a75d80 0x1 0x4c1e6)
0x509cbe78 : 0x537085 (0x6a75d80 0x6b8c180 0x6b66a80 0x5000ae)
0x509cbf28 : 0x537616 (0x6a75d80 0x6a7c6c0 0x8 0xffffffff)
0x509cbf78 : 0x5392c5 (0x6a75d80 0x0 0x509cbfac 0x1
0x509cbfc8 : 0x29e6cc (0x6b4b2b0 0x0 0xffffffff 0xffffffff)
BSD process name corresponding to current thread: Unknown
Mac OS version:
Not yet set
Kernal version:
Darwin Kernal Version 10.4.0: Fri Apr 23 18:28:53 PDT 2010; root:xnu-1504.7.4~1/RELEASE_I386
System uptime in nanoseconds: 121162823
I recently found out all that I should have entered my Snow Leopard DVD and reset the password on my account. However, since I heard about this after this error occurred, when I try to reset my password it say there are no users on my Macintosh HD to reset the password for.
On the disk I tried disk recovery, but at the end of the recovery process it said that the disk couldn't be repaired and that I needed to back up my data and reinstall the OS.
I realized in the error that there is a missing kext file. Is it possible to download this file and place it in its right location on the hard drive?
Any help would be greatly appreciated!

kevinature wrote:
On the disk I tried disk recovery, but at the end of the recovery process it said that the disk couldn't be repaired and that I needed to back up my data and reinstall the OS.
And this is what you need to do, except the message almost certainly said to reformat the volume, not just to reinstall the OS. All the other stuff you did somehow damaged the file system of the Mac partition, so replacing a missing kext file will not help.

Similar Messages

  • Can't boot into Mac OS after Windows install via Bootcamp

    Hello.
    Last night I installed Windows 7 on my Macbook Pro early 2011 via Bootcamp.After some major complications I was able to finally install Windows 7 and boot into it. Now I can't boot back into my "Macintosh HD" partition, it shows a no entry sign.
    Hard Disk : 320GB Internal Sata
    Partitions : 3 -> Mac, Bootcamp and 10.8 Recovery Partition
    The good part is that I can still access the Mac OS partition in Windows and Windows is working perfectly fine. As a matter of fact right now I'm on the bootcamped windows.
    I have a full time machine backup but still I am looking for a way to solve this without formatting the HDD.
    Things I have tried:
    1. Resetting NVRAM and PRAM
    2. Booting into 10.8 recovery partition and running DU.
    SMART Status : Verified
    "Macintosh HD" grayed and Not Mounted
    Successful Verify Permissions (Twice)
    Is there a way to solve this? Though the Mountain Lion partition shows when I press the Alt/option key on startup but I can't somehow boot into it.
    Thanks

    Your problem is OS X is refusing to boot.
    There is still a bootable volume on the Macintosh HD partition, it's just not working.
    You can #8 Reinstall Just OS X while command r booted from the Recovery partition, as long as you don't use Disk Utility to erase the Macintosh HD partition, your files and programs remain.
    Hook the computer via Ethernet cable to a router (or modem, power reset required) with a fast relaible internet connection, you will need your AppleID and password to reinstall OS X.
    Step by Step to fix your Mac

  • Can't boot into Mac OS X.4

    I installed Mac OS 9.2.2 on my PowerMac AGP and when I go to change the startup disk to OS X.4 it doesn't show up. How do I get it to show OS X.4 so that I can go back to Tiger? Thanks

    Hi, Billie -
    I went under the system profiler and it shows that the hard drive with Mac OS X isn't mounted.
    That problem is usually caused by the disk with OSX on it having last been formatted while booted to an OSX install disk, using Disk Utility, and the option to install OS 9 drivers on that drive not having been selected.
    When the OS 9 drivers are not installed on a drive, that drive can not be mounted when the machine is booted to OS 9.
    Article #TA20774 - Disk Is Available in Mac OS X But Not in Mac OS 9
    Since the two OS's are on different volumes, using Startup Manager (as Tom suggested) should work -
    Article #HT1310 - Startup Manager: How to Select a Startup Volume
    You should also be able to hold down the X key during booting to force a boot to OSX.
    If you must have that drive available when booted to OS 9, and if the problem is that it does not have OS 9 drivers installed, the usual solution is to reformat the drive and then re-install OSX (formatting a drive erases everything on it). If using OSX's Disk Utility to do the refomatting, be sure to select the option to install OS 9 drivers (it's often on the Partitioning tab page in Disk Utility). Be sure to set Mac OS Extended as the format.
    The article I linked to offers one possible way to avoid having to reformat the drive - if the drive had ever had OS 9 drivers on it previously, i.e. had been usable when the machine was booted to OS 9, it may be possible to re-install the OS 9 drivers. To do that, boot the machine to OS 9, and run Drive Setup (OS 9's formatting utility). Select the drive in the list, then select Update Drivers from the Functions menu. If this works, the drivers will be re-installed; unfortunately it rarely works.
    Drive Setup's Update Drivers function is a non-destructive action - it will either work or not, but will not erase the drive. However, if you click the Initialize button and okay the process, the drive will be erased.

  • Cannot boot into Mac OS X after partitioning in Windows

    My Mac is a Macbook Pro 17", I got it from my friend (no original disc).
    So after upgrading it to Mavericks (I was unable to install Windows using Boot camp of 10.6.8), Boot Camp successfully let me install Windows 8.1 Pro (x64).
    However, after installing, whenever I install the Software Support in Windows, Windows always show Blue screen after showing the logo. I was able to restore Windows back. Therefore, I am now using Windows with only basic components, no Boot Camp driver.
    The problem is that, I shrink the Boot Camp partition, and create another NTFS partition. Now, I cannot boot into Mac OS anymore. Holding Command + Option + R does nothing, holding Option while startup shows a hard drive named Windows (instead of Mac HD).
    Can I make the Mac bootable again? And if possible, is there any available driver for Windows 8.1?

    Hi iPragash,
    At startup, hold down the Option Key (alt) to choose between Mac OS X and Windows.
    To select what system you want to boot into by default:
    - when in Windows go to the Control Panel ->BootCamp ->Installed Startup Disks
    - when in Mac OS X go to System Preferences->Startup disk.

  • Macbook Pro 17 cannot boot into Mac OS anymore after making partition on windows

    My Mac is a Macbook Pro 17", I got it from my friend (no original disc).
    So after upgrading it to Mavericks (I was unable to install Windows using Boot camp of 10.6.8), Boot Camp successfully let me install Windows 7 Professional (x64).
    The problem is that, I shrink the Boot Camp partition, and create another NTFS partition (so I can store data in the second partition as I usually do when using Windows). Now, I cannot boot into Mac OS anymore. Holding Command + Option + R does nothing, holding Option while startup shows a hard drive named Windows (instead of Mac HD). And no Recovery HD too

    shakhriyor,
    you’re going to need to purchase a replacement pair of the original grey installation DVDs for your MacBook Pro from Apple to be able to fix this problem.

  • Can't boot into Windows 8.1 partition after apple store repair

    Can't boot into Windows 8.1 partition after apple store repair
    I went to the apple store about a week ago to get my screen fixed, and when I get it back I don't have an option to boot into my windows partition. The bootcamp partition is still there, but I can't boot into it. I can still see all of the files on the drive. When I try to boot into windows from the startup disc setting I get "no bootable device — insert boot disk and press any key” on a black screen. I went in for a dead pixel, and the guy at the genius bar ran something on my computer and went into disk utility application. I’m not sure what he was doing, but obviously that’s what messed up my windows partition. How can I be able to boot back into windows? Here's what disk utility looks like on my computer.

    Here's the output
    00000000  eb 52 90 4e 54 46 53 20  20 20 20 00 02 08 00 00  |.R.NTFS    .....|
    00000010  00 00 00 00 00 f8 00 00  3f 00 ff 00 00 b0 0e 2b  |........?......+|
    00000020  00 00 00 00 80 00 80 00  ff bf 2e 0f 00 00 00 00  |................|
    00000030  00 00 0c 00 00 00 00 00  02 00 00 00 00 00 00 00  |................|
    00000040  f6 00 00 00 01 00 00 00  05 92 d3 74 c4 d3 74 aa  |...........t..t.|
    00000050  00 00 00 00 fa 33 c0 8e  d0 bc 00 7c fb 68 c0 07  |.....3.....|.h..|
    00000060  1f 1e 68 66 00 cb 88 16  0e 00 66 81 3e 03 00 4e  |..hf......f.>..N|
    00000070  54 46 53 75 15 b4 41 bb  aa 55 cd 13 72 0c 81 fb  |TFSu..A..U..r...|
    00000080  55 aa 75 06 f7 c1 01 00  75 03 e9 dd 00 1e 83 ec  |U.u.....u.......|
    00000090  18 68 1a 00 b4 48 8a 16  0e 00 8b f4 16 1f cd 13  |.h...H..........|
    000000a0  9f 83 c4 18 9e 58 1f 72  e1 3b 06 0b 00 75 db a3  |.....X.r.;...u..|
    000000b0  0f 00 c1 2e 0f 00 04 1e  5a 33 db b9 00 20 2b c8  |........Z3... +.|
    000000c0  66 ff 06 11 00 03 16 0f  00 8e c2 ff 06 16 00 e8  |f...............|
    000000d0  4b 00 2b c8 77 ef b8 00  bb cd 1a 66 23 c0 75 2d  |K.+.w......f#.u-|
    000000e0  66 81 fb 54 43 50 41 75  24 81 f9 02 01 72 1e 16  |f..TCPAu$....r..|
    000000f0  68 07 bb 16 68 52 11 16  68 09 00 66 53 66 53 66  |h...hR..h..fSfSf|
    00000100  55 16 16 16 68 b8 01 66  61 0e 07 cd 1a 33 c0 bf  |U...h..fa....3..|
    00000110  0a 13 b9 f6 0c fc f3 aa  e9 fe 01 90 90 66 60 1e  |.............f`.|
    00000120  06 66 a1 11 00 66 03 06  1c 00 1e 66 68 00 00 00  |.f...f.....fh...|
    00000130  00 66 50 06 53 68 01 00  68 10 00 b4 42 8a 16 0e  |.fP.Sh..h...B...|
    00000140  00 16 1f 8b f4 cd 13 66  59 5b 5a 66 59 66 59 1f  |.......fY[ZfYfY.|
    00000150  0f 82 16 00 66 ff 06 11  00 03 16 0f 00 8e c2 ff  |....f...........|
    00000160  0e 16 00 75 bc 07 1f 66  61 c3 a1 f6 01 e8 09 00  |...u...fa.......|
    00000170  a1 fa 01 e8 03 00 f4 eb  fd 8b f0 ac 3c 00 74 09  |............<.t.|
    00000180  b4 0e bb 07 00 cd 10 eb  f2 c3 0d 0a 41 20 64 69  |............A di|
    00000190  73 6b 20 72 65 61 64 20  65 72 72 6f 72 20 6f 63  |sk read error oc|
    000001a0  63 75 72 72 65 64 00 0d  0a 42 4f 4f 54 4d 47 52  |curred...BOOTMGR|
    000001b0  20 69 73 20 63 6f 6d 70  72 65 73 73 65 64 00 0d  | is compressed..|
    000001c0  0a 50 72 65 73 73 20 43  74 72 6c 2b 41 6c 74 2b  |.Press Ctrl+Alt+|
    000001d0  44 65 6c 20 74 6f 20 72  65 73 74 61 72 74 0d 0a  |Del to restart..|
    000001e0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
    000001f0  00 00 00 00 00 00 8a 01  a7 01 bf 01 00 00 55 aa  |..............U.|
    00000200
    Here's a better screenshot.

  • I tried partitioning my HD to install linux, the installion was not successful and now I can't boot my mac, I tried internet recovery, it was not helpfull as the disk utility cannot delete the partition I created.

    I tried partitioning my HD to install linux, the installion was not successful and now I can't boot my mac, I tried internet recovery, it was not helpfull as the disk utility cannot delete the partition I created. It was only showing me an error message "EFI files are missing", I realized that it is trying to boot from the new partition I created for the installation of the linux I intended to do.

    It sounds like you may have multiple problems, but none of them are likely to be caused by malware.
    First, the internet-related issues may be related to adware or a network compromise. I tend to lean more towards the latter, based on your description of the problem. See:
    http://www.adwaremedic.com/kb/baddns.php
    http://www.adwaremedic.com/kb/hackedrouter.php
    If investigation shows that this is not a network-specific issue, then it's probably adware. See my Adware Removal Guide for help finding and removing it. Note that you mention AdBlock as if it should have prevented this, but it's important to understand that ad blockers do not protect you against adware in any way. Neither would any kind of anti-virus software, which often doesn't detect adware.
    As for the other issues, it sounds like you've got some serious corruption. I would be inclined to say it sounds like a failing drive, except it sounds like you just got it replaced. How did you get all your files back after the new drive was installed?
    (Fair disclosure: I may receive compensation from links to my sites, TheSafeMac.com and AdwareMedic.com, in the form of buttons allowing for donations. Donations are not required to use my site or software.)

  • Macbook pro will not boot into Mac OSX

    When i got my MacBook Pro it would boot into Mac OSX fine. Now it wont even give me the option and will only let me boot into Windows which i have running through bootcamp. I have tried reinstalling MacOSX but my OSX installion DVD will not get recognised and i cannot boot off it either. I have tried using 2 other discs still with the same issue. The confusing thing is that the CD/DVD drive works fine and the MacOSx discs work fine in other macs as i have tried it in my brothers machine.
    Any help appreciated.
    Thanks

    I don't think that the laptop even has Mac installed anymore becuase in an attempt to reinstall Mac the partition was formatted. And I can't boot of the disc becuase it just ejects by itself after a few seconds in the drive.

  • Can't boot into windows 7 anymore......

    Hi all, I have a Mac mini late 2012 with windows7 installed through bootcamp5. It has worked flawless until recently, now I can't boot into windows anymore. I've checked in finder and the bootcamp partition is present and also all the files. Before that, I did have some trouble with my LaCie 2big thunderbolt hdd, it kept on saying I had to reformat one of the discs in the drive, but only when used in windows, in OSX there was/are no problems reading the hdd .......
    Any idea of how I can make windows bootable again?, do I really have to make a fresh install of windows to make it work??
    Any help is very much appreciated
    Kindly
    Jan

    You might want to visit the Boot Camp forum where the Boot Camp gurus hang out. https://discussions.apple.com/community/windows_software/boot_camp

  • Can I boot into Windows XP from a firewire enclosed Hard Drive? Boot Camp

    I understand you can install XP (as long as it has service pack 2 or 3) on an Intel Mac using Boot Camp, but I was wondering if it would be possible to take a HD from a PC computer which already has XP installed, and, using an firewire HD enclosure, boot the Mac into XP from that. Would this be feasible?

    Yes, but not exactly. The page says:
    "Can I install Windows on an external drive?
    No. Installing Boot Camp on an external hard drive is not supported."
    But I don't want to install Windows, I want to boot my computer into it.
    It also says:
    "External FireWire disks are not recognized by the Startup Disk control panel in Microsoft Windows. To start up from a bootable external drive, press and hold the Option (Alt) key while the computer starts up, then select the external disk."
    I don't mind if external disks won't appear under Windows, as long as I can still boot into it.
    I found another helpful post:bootcamp windows 7 Firewire external drive NTFS?
    Here someone writes:
    "I still use Windows XP with my Mac but still never had such a problem with my two Firewire external HDs (one FW400 and one FW800).
    And I did a lot of things with these
    Partioned one for use with OSX and Windows (one HFS+ partition; one NTFS partition); copied my complete MP3-collection (180GB) from one external HD to the other; etc.
    All without any kind of glitch or slowdown."
    So it seems this person was successful in booting XP from an external drive. Windows 7 or Vista on the other hand will encounter problems booting, which that tread explains.
    In another thread (Boot camp on an external hard drive) someone wrote:
    "I believe there might be a way, I just haven't gotten around to trying this out.
    1) use disk utility to partition the external drive to ntfs (i think)
    2) attach this disk to a pc and install the OS
    3) install refit onto your mac
    4) attach the drive via fw800, or even better yet esata, to you mac.
    5) Start up your mac
    6) choose the win xp option from the boot menu
    7) install bootcamp drivers
    this seems, in theory, that it should work."
    So from what I gather, I think this method would probably work, I just want to know if anyone had any specific knowledge regarding this subject.
    From here I only have two questions:
    Is it possible to take a working drive from a PC which already has XP installed, and change the format to ntfs under OSX without damaging the drive or OS?
    And, would I need a version of XP with service pack 2 or 3, or will anything do, since we are not installing it with Bootcamp, we are only running it under Bootcamp at this point.
    Thanks for any help!

  • Kernel Panic, but I can still boot into windows? :(

    Hi folks,
    2007?'ish MBP 2.2
    machine (normally) boots right in to SL (latest rev).
    holding option, I can choose SL or Windows XP.
    I have a firmware password set up (i know the password if i need it)
    the problem: when i turn my mac on, it will not boot into Mac right away. I get an error that it's "unable to find driver for this platform: \ "ACPI\".\n"@/SourceCache/xnu/xnu-1486.2.11/iokit/Kernel/IOPlatformExpert.cpp.:1 389
    there's more, but I won't type it just yet b/c I just thought of a possible reason:
    I was reviewing photos with a client for a slideshow (everything is backed up..no worries) and she had a thumb drive with more photos. I plugged it in the USB, but it wouldn't read or open in finder.
    No worries - I ran downstairs to my mac pro, it worked. Dragged the pics off.
    Shut down my macbook pro b/c I wasn't using it and when I tried to turn it on later, this problem is there.
    What I've tried:
    resetting SMC
    resetting PRAM
    can't do the TDM - read the article about needing to install the software to open passwords, but hard to do if the computer is down (unless they mean installing it on the machine from which I'm trying to access it?)
    i tried holding option to key in my firmware password, but the same thing happens - can't access the Mac side of things. I can access the Windows section and as I'm typing this, it looks like I'm able to access the install disc
    Just thought I would post this for 2 reasons:
    1. to see if there's anything else I can do (I am going to try disk utilities to repair the disc)
    and 2. to help anyone else out in case they have the same issue.
    Cheers,
    Keebler

    Backup what you can, boot from a compatible installer DVD, erase the hard drive, then reinstall OS X.
    Alternatively, you can try the following:
    How to Perform an Archive and Install
    An Archive and Install will NOT erase your hard drive, but you must have sufficient free space for a second OS X installation which could be from 3-9 GBs depending upon the version of OS X and selected installation options. The free space requirement is over and above normal free space requirements which should be at least 6-10 GBs. Read all the linked references carefully before proceeding.
    1. Be sure to use Disk Utility first to repair the disk before performing the Archive and Install.
    Repairing the Hard Drive and Permissions
    Boot from your OS X 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 Installer menu (Utilities menu for Tiger.) 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 quit DU and return to the installer.
    2. Do not proceed with an Archive and Install if DU reports errors it cannot fix. In that case use Disk Warrior and/or TechTool Pro to repair the hard drive. If neither can repair the drive, then you will have to erase the drive and reinstall from scratch.
    3. Boot from your OS X Installer disc. After the installer loads select your language and click on the Continue button. When you reach the screen to select a destination drive click once on the destination drive then click on the Option button. Select the Archive and Install option. You have an option to preserve users and network preferences. Only select this option if you are sure you have no corrupted files in your user accounts. Otherwise leave this option unchecked. Click on the OK button and continue with the OS X Installation.
    4. Upon completion of the Archive and Install you will have a Previous System Folder in the root directory. You should retain the PSF until you are sure you do not need to manually transfer any items from the PSF to your newly installed system.
    5. After moving any items you want to keep from the PSF you should delete it. You can back it up if you prefer, but you must delete it from the hard drive.
    6. You can now download a Combo Updater directly from Apple's download site to update your new system to the desired version as well as install any security or other updates. You can also do this using Software Update.

  • I can't see the Mac partition (and I can't install Mac Os X!)

    Well, I installed Windows XP, I used MacDrive, etc. Suddenly it appeared a blue screen (in XP) and now I can't see the Mac partition, even pressing Alt while booting. Also I can't reinstall Mac Os X because the Mac partition doesn't appear in the install's menu or in the disk utilities (in the disk utilities it gets freezed when I try to enter to it, so I can't manage or restore the hard drive)
    Help!

    Hi, Ralph,
    The problem is that I did erase the partition, using disk utility, but I can't go back to my original disk size pre-partition, as disk utility won't let me do it and gives the message "Couldn’t modify partition map because file system verification failed." When I try to use Boot Camp Assistant it won't let me select the third option to remove windows.

  • Can you boot a Mac Pro using a USB Pen Drive?

    Hello.
    Can you boot a Mac Pro using a USB Pen Drive? OS=Windows or Linux or BSD or MacOS... I know it is bios specific on a PC if the option is available. If this is possible, does anyone have a link to instructions?
    Thanks,
    Scott

    Not to get in to an argument over semantics here, but by saying "Windows should boot if you have installed the requisite Boot Camp drivers," you are implying "that the Boot Camp drivers [are] needed for Windows to boot." I was just clarifying your post so people didn't get confused.
    As for booting a Mac Pro off a USB flash drive, if you have been successful in doing so, can you share with me your method? I've tried booting of an OCZ Rally2 4GB flash drive and it's never worked on my Mac Pro. It doesn't show up when I hold option down and if I try to boot through rEFIt, I get an error about my Mac's firmware not supporting USB booting (I have the latest firmware installed, too). I've tried GPT and MBR partitions, both to no avail. Booting off USB hard disk drives is no problem though. And I can boot off this flash drive on a Core Duo iMac.
    Any ideas?

  • Can I boot into a PC laptop on an iMac using Bootcamp through a eSATA to Thunderbolt connection?

    Can I boot into a PC laptop on an iMac using Bootcamp through a eSATA to Thunderbolt connection?  Work forces you to use their computers, but it would be nice to use an iMac and extra displays while at home.

    Set up a VNC connection between the computers.
    (51819)

  • Hi, can anyone help with the problem I am having with pro book 4440s? I can't boot into windows 7.

    Hi, can anyone help with the problem I am having with pro book 4440s?  I can't boot into windows 7, nor can I enter the bios cause i fogot the password. the error I am getting says "windows failed to start. a recenr hardware or software change might be the cause.   it then gives me options to boot from a disc but I can't do that cause I am unable to get into the bios to change it to boot from a disc.
    The error message goes on :
    File: \Boot\BCD
    Status: oxcoooooof
    info: An error occurred while attempting to read the boot configuration.
    the only two options on the screen are enter=continue and ECS=exit
    I just can't get pass this screen.
    Please help.
    Thanks

    Hi,
    If you don't already have one, use another PC to create a Windows 7 Rescue CD.  Download the relevant ISO from the links below.
    Windows 7 32bit
    Windows 7 64bit
    You should use an application such as ImgBurn to burn the ISO to a CD - a guide on using ImgBurn to write an ISO to a disc is Here.  Once created, or if you already have this, tap away at the esc key as you start the notebook to enter the Start-up Menu.  Insert the Rescue CD.  Select Boot options ( usually f9 ), use the arrow keys to select the CD/DVD drive and hit enter.  You may also get a prompt to 'Press any key to continue' - do this if asked.
    When loaded, select Repair Your Computer and choose the Command Prompt.  When this loads, enter the following commands and hit enter after each one - include spaces as shown.
    Bootrec.exe
    bcdedit /export C:\BCD_Backup
    c:
    cd boot
    attrib bcd -s -h -r
    ren c:\boot\bcd bcd.old
    bootrec /RebuildBcd
    bootrec /fixmbr
    bootrec /fixboot
    Remove the Rescue CD and try rebooting the notebook.
    Regards,
    DP-K
    ****Click the White thumb to say thanks****
    ****Please mark Accept As Solution if it solves your problem****
    ****I don't work for HP****
    Microsoft MVP - Windows Experience

Maybe you are looking for