More Mojave APFS Questions

Discussion in 'macOS Mojave (10.14)' started by getrealbro, Nov 1, 2018.

  1. getrealbro macrumors 6502

    Joined:
    Sep 25, 2015
    #1
    What does the Mojave installer do with/to an internal spinning hard disk (GUID partition map & HFS+) that has 2 partitions: System and Data?

    Does the installer convert the whole drive to APFS?

    And if so, does it maintain the “partitioning”?

    GetRealBro
     
  2. Weaselboy Moderator

    Weaselboy

    Staff Member

    Joined:
    Jan 23, 2005
    Location:
    California
    #2
    It will only convert the partition the OS is on.
     
  3. getrealbro thread starter macrumors 6502

    Joined:
    Sep 25, 2015
    #3
    Thanks! If I understand you correctly, after installing Mojave the internal hard drive would retain the GUID partitions. The System partition would be formatted APFS and the Data partition would remain formatted HFS+. So this would allow me to boot using an older version of OS X on an external drive, SD card, etc. to run legacy software accessing files in the HFS+ formatted Data partition.

    Thanks again — GetRealBro
     
  4. Weaselboy Moderator

    Weaselboy

    Staff Member

    Joined:
    Jan 23, 2005
    Location:
    California
    #4
    Yep... exactly.
     

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