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I am currently trying to set up dual boot on my Mac. I installed rEFInd to its own partition (512MB), formatted as "Mac OS Extended (Journaled)". I wanted to use the same partition as my boot partition under linux. But every time I pacstrap my system, I get an error message stating that "/mnt/boot is mounted as read-only". It's probably because it can only read the mounted partition based on the filesystem I used. I read that installing it on the existing EFI partition has caused some problems for other people so I wanted to go and take the "safe route".

I want to use rEFInd to start my OS', I do not really care if it shows up on the Startup Manager provided by Apple. I just want to be able to boot into OS X if something happens and goes horribly wrong :)

Is using FAT32 as the formatting a good idea? It would allow me to mount is as rw and make it usable as my boot partition. Or how do you guys have installed rEFInd on your systems?

  • Generally, Linux can not write to a "Mac OS Extended" partition unless journaling is turned off. – David Anderson Mar 25 '18 at 0:52
  • @David That's the thing. As of disk utility, journaling is actually turned off. I disabled it under the file menu. But it still shows up as being enables in the filesystem for odd reasons. – SirWindfield Mar 25 '18 at 5:56
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For those that might have similar questions/problems. You have to explicitly disable journaling using diskutil on the command line. Using Disk Utility.app does not work properly.

  • It is not that the Disk Utility does work properly. Actually, the Disk Utility used to have the ability to turn off journaling. Apple removed this feature a few mountains ago. – David Anderson Mar 26 '18 at 11:18
  • It still has it, at least the menu entry. That's the thing. I clicked on the menu entry: 'Disable Journaling'. But is literally does nothing – SirWindfield Mar 26 '18 at 12:09

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