So I have Ubuntu 12.04.1 installed alongside Mac OS X 10.4.11 on my iMac G5 with powerpc architecture.

I only have one internal hard drive and I created a small 5 GB partition on it and formatted it to fat32 with GParted in Linux, but OS X won't recognize it, Disk Utility sees it as mere empty space.

I also tried to format it as NTFS and install ntfs-3g on Mac OS X as a plugin toread and write to NTFS but the same thing happens, the partition is seenas mere empty space and thus can't be mounted. I can't even partition anything from Disk Utility because it says that this disk drive is the startup boot drive.

Any ideas?


You should be able to read the MAC OSX partition from Ubuntu 12.04 without any modifications. You might have to mount the partition, although I would expect Ubuntu to automatically mount it read only, so you just have to find the partition in the file browser and open it.

OSX by default uses journaled HFS+ as it's file system. Ubuntus kernel has support for this file system built in. If you want read/write access to the OSX partition, you have to disable journaling in OSX. Here are some guides with more details:



  • I know I can read and write to HFS+, but I'm having file permission problems so I wanted to have a shared fat32 partition through which I could exchange files without permission problems. I just ran fdisk -l in Terminal, and the fat32 partition I created with GParted shows up as a linux native partition Apple_UNIX_SVR2. Shouldn't it be shown as fat32 instead? The same thing shows up in Disk Utility, that Apple_UNIX_SVR2 thing.
    – user89004
    Sep 13 '12 at 7:02
  • Is it normal to receive a Bad super block magic number missing error in Mac OS X when running fsck with -ly? I run fsck from Ubuntu on that Mac HFS+ partition and it says all is fine. I just wanted to be sure of this. It's probably because of the boot loader, isn't it?
    – user89004
    Sep 13 '12 at 7:16
  • I would not recommend disabling journaling, and I do not recommend writing to the OSX system partition from a different OS. If you want to read and write to some files from both OSs, you should create a separate partition for this purpose. Non-journaled HFS+ would work as a file system, FAT 32 should also work.
    – Sandy8086
    Sep 13 '12 at 7:25
  • Well, that's what I said, FAT32 DOESN'T work for me as Mac OS X fails to recognize it. Disk Utility says it's Apple_UNIX_SVR2 instead of Fat32. I partitioned it with GParted under Ubuntu. I want to do this so I can get rid of file permission errors, as I can't access my Home folder on my Mac partition from Ubuntu. Is there any other way around this without screwing up files for the Mac partition?
    – user89004
    Sep 13 '12 at 7:43
  • Well, unjournaled HFS+ works fine for both OSes, but now I'm worried about the FAT32 and NTFS partitioning capabilities of GParted. Is there something wrong iwth it since fdis -l sees both partitions that GParted makes as being LINUX native Apple_UNIX_SVR2?
    – user89004
    Sep 13 '12 at 8:07

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