Right now I am running OS X 10.6.8 (Snow Leopard) on my MacBook Pro, with Windows 7 via Boot Camp, and I also have a third FAT32 partition where I share data between Mac/Windows.

I am going to upgrade to Mavericks. I Googled and it seems Mavericks is not going to be happy with letting me create the third FAT32 partition.

Did anyone create a third partition with Mavericks before? What are the steps?

(I have backed up all my data from both OS X and Windows, and I am going to format whole hard disk, and fresh install snow leopard, then update to Mavericks).


The process for creating an extra partition in Mavericks hasn't changed much since Snow Leopard, so you should be able to create a partition using Disk Utility the same way you did in Snow Leopard.

  • Doesn't the recovery partition of Marvicks create problems for this procedure? – cybergeek654 Sep 29 '14 at 16:34
  • No, once Mavericks is installed, the Recovery partition doesn't even appear in the Disk Utility panel. So, you can just create partitions as you would usually. – Thomas Jones Sep 29 '14 at 16:35
  • When partitions are modified, during the process, the log actually states "Manipulating Recovery partition". It's all done automatically. – Thomas Jones Sep 29 '14 at 16:37

Wait, before you do that, you can do this in an easier fashion.

Just shrink the Mac partition via Disk Utility and format the new free space as FAT32.

  • I have another had disk that with same configuration (one partition for Snow Leopard, one partition for Win7 Boocamp, and one FAT32 data partition). I updated to Marvicks while having this hard disk on my mac, and I have two problems: 1. becasue of third partition, installer says it is unusal partition configuration, and did not create the Recovery Partition. 2. It does not boot to Bootcamp anymore! So I figure I should do a clean install – cybergeek654 Sep 29 '14 at 16:33

I had the same config in my Lion but now with the new mavericks I tried it twice: 1) installed WIN7 and then reduced the Macintosh partition before creating a 3rd partition in disc utility. Result: Bootcamp not bootable anymore but the other 2 partitions worked fine 2) same same except that I now let disc utility devide the macintosh partition. Result was also same. Still looking for the answer. I think my next step will be partition magic or the like.

  • try this: after you install Win7 via bootcamp, devide the mac partition, and create 3rd partition with disk utility. Boot camp windows wont boot. now you need to boot via win7 CD/USB, via recovery mode, go to command prompt and REPAIR the boot specifications. (go to command, and rub FIXBOOT C:, where C is your windows partition). good luck. – cybergeek654 Oct 4 '14 at 11:29

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