After letting the FreeBSD installer to "automatically create an EFI partition" on my MacBook Air, there seems to be some problem with my internal SSD:

192:~ sunqingyao$ diskutil list
/dev/disk0 (internal, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:     FDisk_partition_scheme                        *121.3 GB   disk0
   1:                       0xEE                         209.7 MB   disk0s1
   2:                  Apple_HFS Macintosh HD            60.6 GB    disk0s2
   3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3
   4:                       0xEE                         209.7 MB   disk0s4

Obviously, 209.7 MB + 60.6 GB + 650.0 MB + 209.7 MB < 121.3 GB. Nearly 60GB of my disk space just disappears!

Also, in case it's relevant:

192:~ sunqingyao$ sudo gpt -r show disk0
Password:
gpt show: disk0: Suspicious MBR at sector 0
      start       size  index  contents
          0          1         MBR
          1          1         Pri GPT header
          2         32         Pri GPT table
         34          6
         40     409600      1  GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B
     409640  118284248      2  GPT part - 48465300-0000-11AA-AA11-00306543ECAC
  118693888    1269536      3  GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC
  119963424     409600      4  GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B
  120373024  104857600      5  GPT part - 516E7CB6-6ECF-11D6-8FF8-00022D09712B
  225230624   11747328      6  GPT part - 516E7CB5-6ECF-11D6-8FF8-00022D09712B
  236977952        190      7  GPT part - 83BD6B9D-7F41-11DC-BE0B-001560B84F0F
  236978142          1
  236978143         32         Sec GPT table
  236978175          1         Sec GPT header

First Aid of Disk Utility doesn't help:

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  • The first thing to do is back up that MacOS. What exactly is the problem, other that 60G gone missing? The Mac should already have an EFI partition. Any particular reason for trying to create another one? – Emmanuel Rosa May 28 '17 at 21:17
  • @EmmanuelRosa Thanks, I'll backup it with Time Machine. Yes I did see an EFI partition on my disk when partitioning the disk, but FreeBSD installer told me something like "FreeBSD won't be bootable without an EFI partition, balabala, do you want to create one? <Yes/No>" Then I think to meself "well the installer must be right" and chose Yes, and it created one for me. And 60G of my disk space just disappeared :( – nalzok May 29 '17 at 3:55
  • Try looking at your disk with a more advanced partitioning tool, like gparted. That MacOS Disk Utility tries to be too smart for it's own good. You can use a Linux LiveCD with Gparted to have a look around. For example, I know the GoboLinux live CD has Gparted (since I used it just yesterday). – Emmanuel Rosa May 29 '17 at 14:56

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