14 Replies Latest reply: Jun 5, 2010 10:05 AM by LewInVT
SkFb Level 1 Level 1 (0 points)
Hi,

I have a brand new MBP 6,1 i5 , and it's impossible to boot on an external drive. Is there known issues about that?
It does recognize USB drive at boot but it is stuck with the grey apple and nothing more happens.

Message was edited by: SkFb

MBP 2010 i5, Mac OS X (10.6.3), none
  • 1. Re: MBP 2010 - Impossible to boot on an USB drive
    S.U. Level 6 Level 6 (8,360 points)
    Welcome to Apple Discussions!

    What is on the external drive--is it a clone of your internal drive or is it something else? How is your external drive formatted?
  • 2. Re: MBP 2010 - Impossible to boot on an USB drive
    Rod Hagen Level 7 Level 7 (31,985 points)
    No its not known as an issue at all with them. It indicates that either the OS you have on your external drive is not appropriate for this model, or that it is corrupted.

    What operating system do you have installed on the external drive? You will need at least 10.6.3 on it to boot the new MBP 2010, probably at least of the same "build" version as the one that comes with it.

    Cheers

    Rod
  • 3. Re: MBP 2010 - Impossible to boot on an USB drive
    MacRS4 Level 2 Level 2 (330 points)
    It may not be a known issue right now but I have exactly the same issue on two of the i7s. With a cloned system drive in a USB enclosure it won't boot.

    You get the Apple logo then it brielfy flashes to the 'no entry' sign.

    For what it's worth I get exactly the same issue (on both) when trying to boot from an external DVD drive too using the Apple DVDs that ship with the computer. The only way for me to boot from them currently is to use the internal DVD drive.

    The DVD drive works fine on the mini, and I can boot the cloned drive on the Mini too with no problems.

    It's a frustrating one for sure.
  • 4. Re: MBP 2010 - Impossible to boot on an USB drive
    SkFb Level 1 Level 1 (0 points)
    Hi,


    MacRS4 : you explain betterthan me, but i have exactly the same problems you describe.
    It is an Snow Leopard 10.6.0, original DVD, burn as an image on one USB drive, HFS+ formated; i generally use for installation because it's more faster. This USB drive does work on my iMac and my previous MBP Unibody 2009, I can boot on it and after i can install Snow Leopard on an USB/Firewire drive, or on the internal hard drive.

    But with the new MBP 2010, when i boot on the USB drive in order to install Snow, the boot loader see the drive, begin to boot, but doesn't go further than the grey Apple.

    If i Clone the original system set on my ssd drive it's fine . But impossible to make a clean install on the external, only cloning on internal existing system works.

    I do know an other guy who have the same issue

    Message was edited by: SkFb
  • 5. Re: MBP 2010 - Impossible to boot on an USB drive
    Rod Hagen Level 7 Level 7 (31,985 points)
    Yes, sounds as if the Snow Leopard version and build is definitely too early to properly boot the 2010 computer, I'm afraid. For the 15" & 17" 2010 models you need OSX 10.6.3 (build 10D2063a) or later. For the 13" you need 10.6.3 (build 10D2125) or later.

    As far as installing from your 10.6.3 MBP 2010 DVDs goes, you say that you formatted the external drive as HFS+ format, but did you also repartition it using the GUID partition scheme? Unless the drive has been partitioned as GUID as well (rather than Apple Partition Scheme or Master Boot Record) then the installer discs won't install a system on it (though you can clone the internal drive to it and then boot from it, as you have discovered).

    Cheers

    Rod
  • 6. Re: MBP 2010 - Impossible to boot on an USB drive
    SkFb Level 1 Level 1 (0 points)
    Hi,

    Partition table is set properly, this drive works with all other machine i have, except 2010. I'll try with an image of the enclosed DVD.
  • 7. Re: MBP 2010 - Impossible to boot on an USB drive
    SkFb Level 1 Level 1 (0 points)
    So,

    That was the Build. By imaging the DVD who is Build 10D2063a, it is working, i can boot on it and install on external drive .

    But it means i can not use anymore my Original Snow Leopard DVD,it is not a big deal, but my issue is fixed now. I was thinking at first at a kind of bug, (or worst, a "feature" as Bill Gates said) or some new restriction, it is not.

    I wait for somebody to confirm before to pull a resolved flag.

    Thx for previous answers and interest.
  • 8. Re: MBP 2010 - Impossible to boot on an USB drive
    LordMerovingian Level 1 Level 1 (145 points)
    Have you guys checked to make sure that the HD's are partitioned as GUID, which is required to boot an Intel Mac?
  • 9. Re: MBP 2010 - Impossible to boot on an USB drive
    SkFb Level 1 Level 1 (0 points)
    Yes, i said it twice
    The truth is somewhere else : the build os 10.6.x needed .
  • 10. Re: MBP 2010 - Impossible to boot on an USB drive
    LewInVT Level 1 Level 1 (5 points)
    I can confirm the same problem with a new Core i7 MBP received yesterday.

    I cannot boot from a 16GB USB thumb drive that has OSX 10.6.3 on it. I also cannot boot from a DiskWarrior DVD. I was able to boot with both on my old MBP C2D.

    Any thoughts?

    Lew
  • 11. Re: MBP 2010 - Impossible to boot on an USB drive
    eww Level 9 Level 9 (52,975 points)
    Unless the 10.6.3 on your thumb drive was installed there from the DVDs that came with your MBP, you can't boot from the thumb drive. The machine requires at least the same build that was installed on it at the factory.

    The DiskWarrior disc doesn't contain a recent enough OS X build to boot your machine, either. Check Alsoft's web site often for upgrades and updates.
  • 12. Re: MBP 2010 - Impossible to boot on an USB drive
    LewInVT Level 1 Level 1 (5 points)
    Thanks, eww, for your response. It appears you are quite correct. I was able to boot from a SuperDuper clone created on an external FireWire drive.

    So once osx 10.6.4 is released and I update both my MBP and thumb drive, I should be able to boot from the thumb drive. Is that right?

    As for DiskWarrior, I did check their site prior to my first post and it appears my dvd contains the latest version. No updates as yet. I do have DiskWarrior on my thumb drive, so I'll use that one or boot from a clone if I need it.

    Lew
  • 13. Re: MBP 2010 - Impossible to boot on an USB drive
    eww Level 9 Level 9 (52,975 points)
    So once osx 10.6.4 is released and I update both my MBP and thumb drive, I should be able to boot from the thumb drive. Is that right?


    Yes, I think that's right. But I also think that if you installed 10.6.3 on your thumb drive from your MBP's bundled discs and applied all currently available and applicable updates to it, you'd be able to boot from the thumb drive without waiting for 10.6.4.
  • 14. Re: MBP 2010 - Impossible to boot on an USB drive
    LewInVT Level 1 Level 1 (5 points)
    I also think that if you installed 10.6.3 on your thumb drive from your MBP's bundled discs and applied all currently available and applicable updates to it, you'd be able to boot from the thumb drive without waiting for 10.6.4.


    I agree. However, in light of the imminent release of 10.6.4 I think I'll just wait for it to happen. Since I'll have to apply the update to both my MBP and the thumb drive in either case, I may as well wait.