Previous 1 2 3 Next 143 Replies Latest reply: Mar 15, 2010 3:17 PM by Jman5112
redpola Level 1 (25 points)
I closed all my apps.
I ran the installer.
I agreed the terms.
I am ask where to install Snow Leopard.
Only one disk is available - my boot disk.
It has a yellow triangle on it.

Selecting the disk tells me "Mac OS X cannot be installed on "Macintosh HD", because this disk cannot be used to start up your computer.".

Rebooting and attempting an install direct from CD yields the same results.

My machine is a six month old aluminium MacBook, and the only difference between it in the shop and today is that it has a customer-installed 500GB hard drive and ditto 4GB RAM in it.



Aluminium Macbook, Mac OS X (10.5.8), 500GB customer installed HD and 4GB customer installed RAM
  • William Maxwell Level 1 (90 points)
    What are the details of the hard disk partition and drive format?
  • Fortuny Level 7 (21,435 points)
    Hi Neil,

    check with Disk Utility to see if your harddisk is using the GPT (GUID) partition table.

    While in DU verify your harddisk (and in case repair it).


  • redpola Level 1 (25 points)
    Hi William, here are the details.

    Name : Macintosh HD
    Type : Volume

    Disk Identifier : disk0s2
    Mount Point : /
    File System : Mac OS Extended (Journaled)
    Connection Bus : Serial ATA 2
    Device Tree : /PCI0@0/SATA@B/PRT0@0/PMP@0/@0:2
    Writable : Yes
    Universal Unique Identifier : 563134B4-E285-3A9A-9C99-82BAC6CBB81E
    Capacity : 465.4 GB (499,763,888,128 Bytes)
    Free Space : 73.1 GB (78,447,783,936 Bytes)
    Used : 392.4 GB (421,316,104,192 Bytes)
    Number of Files : 1,991,815
    Number of Folders : 391,908
    Owners Enabled : Yes
    Can Turn Owners Off : Yes
    Can Repair Permissions : Yes
    Can Be Verified : Yes
    Can Be Repaired : Yes
    Can Be Formatted : Yes
    Bootable : Yes
    Supports Journaling : Yes
    Journaled : Yes
    Disk Number : 0
    Partition Number : 2
  • redpola Level 1 (25 points)
    Hi Stefan,

    I don't know how to use the Disk Utility to ascertain whether my HD is using GPT (GUID) partition table but I bought the machine new, installed a brand new 500GB drive in it and then installed Leopard in as default a manner as possible.

    I've pasted the disk info also in this thread if that's useful.

    I've since rebooted, repaired permissions, repaired disk, and the SL installer still thinks my disk is non-bootable.

  • Mike Boreham Level 4 (2,095 points)
    I have the same problem.

    The "Take Control of Upgrading to Snow Leopard" mentions this as a rare problem in the troubleshooting section, and says the solution is to make a clone (Superduper/CCC) of the "yellow triangle" volume and install Snow Leopard onto this then clone back to "yellow triangle" volume.

    I am in the middle of doing this, currently installing onto the clone which did not have yellow triangle.

    No explanation of cause, and no other suggested workaround.

    I had repaired permissions, run Diskwarrior etc on my Leopard boot volume before trying Snow on it.
  • Mike Boreham Level 4 (2,095 points)
    My boot vol is/was GUID
  • redpola Level 1 (25 points)
    Hi Mike,

    Sorry you're having the same problem. It's very frustrating! I'm making some noise about it because as a consequence of being in the software biz for years, I keep machines as vanilla and default as possible whilst serving my purposes as best I can - so I hopefully tread a very well worn QA path. That I am suffering problems probably means a great many more are doing the same.

    Unfortunately your solution isn't a good one for me - I simply don't have 400GB of space anywhere nearby. I do have Time Machine backup to a Time Capsule so maybe a solution is to do a vanilla install and clean disk and then a restore. I don't fancy this much though.

    I can't help feeling that this is a simple defect in the installer disk detection though, that it uses some custom code rather than systemwide routine to detect bootability.

  • Martin Matthey1 Level 1 (40 points)
    Same with my machine;

    In uninstalled PGP desktop (from within the program by the way) and that did the trick.

    New version PGP desktop snow Leo compatible on its way: now-leopard/

  • dordoka Level 1 (0 points)
    Exactly the same problem here.
    GUID partition table, created during Leopard installation a while ago, only one partition, no bootcamp,... nothing, all vanilla.

    Same error and yellow exclamation over my Macintosh HD volume, either launching directly the installation assistant from Leopard or booting directly from the Snow Leopard installation DVD.

    I totally agree that this is an Installer bug and the workaround is not acceptable: that actually means that the upgrade procedure is faulty and not useful for a not yet determined number of users...

    Please find a better workaround for this.

    Thanks very much.
  • William Maxwell Level 1 (90 points)
    Please run this command in Terminal and send the output to this thread, thanks:
    df -k
  • redpola Level 1 (25 points)
    Hi Bill,

    splat:~ neil$ df -k
    Filesystem 1024-blocks Used Available Capacity Mounted on
    /dev/disk0s2 488050672 411196520 76598152 85% /
    devfs 116 116 0 100% /dev
    fdesc 1 1 0 100% /dev
    map -hosts 0 0 0 100% /net
    map auto_home 0 0 0 100% /home
    /dev/disk1s3 6578972 6497048 81924 99% /Volumes/Mac OS X Install DVD
    /dev/disk2s2 15208656 5659312 9549344 38% /Volumes/redpola
    afp_0TSQUm1B8Jr700mE1H0Pyetl-1.2d000004 974665392 793955116 180710276 82% /Volumes/Data
    /dev/disk3s2 974665360 793987852 180677508 82% /Volumes/Backup of splat
    /dev/disk4s2 9524 8724 800 92% /Volumes/Capture Data 8.2
  • dordoka Level 1 (0 points)
    Hi Bill

    thanks a lot for your quick response. Unfortunatelly I'm at work right now so I will provide you with the output later today when I get home.

    Thanks very much!
  • redpola Level 1 (25 points)
    I'd like to publically confirm that I am running PGP Desktop 9.10.
  • gicmo Level 1 (0 points)
    I had the same issue on my MacBook (aluminum unibody). I had a linux & linux swap partition; after I removed those with gparted the installation worked just fine. I have heard that osx likes to have 128k space between partitions and maybe that wasn't the case.
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