This bug was fixed in the package parted - 2.3-8ubuntu4
---------------
parted (2.3-8ubuntu4) precise; urgency=low
* At least some Intel Macs get rather upset if we revert to a protective
MBR, so try harder to avoid this and to do a better job of writing a
hybrid MBR:
- Write a type code of 0x83 for more filesystems, and 0xda for
non-filesystem partitions.
- Do not rely on filesystem probing to recognise EFI System Partitions.
- Write a protective partition starting at LBA 1 if we find an EFI
System Partition or BIOS Boot Partition in the first position, even if
it does not really begin at LBA 1 (LP: #856826).
- Ensure that protective partitions corresponding to an ESP or BBP
always have starting cylinder 0, head 0, sector 1.
- Don't revert to a protective MBR just because the first GPT partition
wasn't recognised as anything in particular.
- Add tests for hybrid MBR syncing.
-- Colin Watson <[email protected]> Thu, 08 Mar 2012 15:44:55 +0000
** Changed in: parted (Ubuntu Precise)
Status: Confirmed => Fix Released
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https://bugs.launchpad.net/bugs/856826
Title:
'guided resize' partioning leaves Mac unbootable
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