Comments on: GUID problem with Leopard, and a fix. http://blog.iresq.com/guid-problem-with-leopard-and-a-fix/ iPhone problems - iResQ provides repair services for the entire line of iPods, iPhones, Portables Macs, Desktops, MacMinis, and Apple TV systems, including parts and accessories such as iPod parts. Fri, 15 Oct 2010 15:14:34 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: mosk22rte http://blog.iresq.com/guid-problem-with-leopard-and-a-fix/comment-page-1/#comment-64 mosk22rte Sat, 12 Jan 2008 22:55:02 +0000 http://www.iresq.com/blog/?p=22#comment-64 Thanks for posting this! I have an Intel MacMini and had removed the internal drive and upgraded to an external SATA drive, which I had previously formatted as an Apple Partition. Your description above saved me a bit of head scratching after Leopard refused to install. Thanks! Thanks for posting this! I have an Intel MacMini and had removed the internal drive and upgraded to an external SATA drive, which I had previously formatted as an Apple Partition. Your description above saved me a bit of head scratching after Leopard refused to install. Thanks!

]]> By: Eric http://blog.iresq.com/guid-problem-with-leopard-and-a-fix/comment-page-1/#comment-21 Eric Mon, 10 Dec 2007 02:07:53 +0000 http://www.iresq.com/blog/?p=22#comment-21 I got exactly this error message when I tried to upgrade. Thank you for posting it verbatim -- when I googled on the error message text, this page was the first hit. What a relief, to have a quick answer! I had upgraded my MacBook Pro with a Western Digital hard disk a while ago. I used Super Duper to make a bootable copy of my system on the WD disk, which was initially set up as an external USB drive. Then I opened the computer, removed the original hard disk, and installed the WD disk in its place. I had made sure to format the WD disk's volume as Mac OS Extended (Journaled), but it never occurred to me to check the disk's partition scheme as well. When I was done with my disk upgrade the system booted and worked just fine, so I assumed everything was good until I ran into this GUID error today. So in hindsight, although OS X won't install onto a non-GUID disk, it will apparently boot from a non-GUID disk if it's been copied there with Super Duper. I got exactly this error message when I tried to upgrade. Thank you for posting it verbatim — when I googled on the error message text, this page was the first hit. What a relief, to have a quick answer!

I had upgraded my MacBook Pro with a Western Digital hard disk a while ago. I used Super Duper to make a bootable copy of my system on the WD disk, which was initially set up as an external USB drive. Then I opened the computer, removed the original hard disk, and installed the WD disk in its place. I had made sure to format the WD disk’s volume as Mac OS Extended (Journaled), but it never occurred to me to check the disk’s partition scheme as well. When I was done with my disk upgrade the system booted and worked just fine, so I assumed everything was good until I ran into this GUID error today.

So in hindsight, although OS X won’t install onto a non-GUID disk, it will apparently boot from a non-GUID disk if it’s been copied there with Super Duper.

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