Best way to create Mojave run on external SSD?

Discussion in 'macOS Mojave (10.14)' started by iBaba, Oct 20, 2018.

  1. iBaba macrumors member

    iBaba

    Joined:
    Jul 10, 2018
    #1
    I got a 500GB Sandisk Extreme SSD that I connect to a Late 2012 iMac that has USB3.

    What is the best and fastest format to run this on?

    Also os it wise to make a partition and run ti from there and use the other part to store files etc?
     
  2. Tech198 macrumors G5

    Joined:
    Mar 21, 2011
    Location:
    Australia, Perth
    #2
    Run through the installer wizard as you normally would, but when "selecting the drive to install on", select your external instead..

    As for format, you won't really have much of a choice after install as it will be APFS being an SSD.

    Up to you it you wanna create more than one partition but APFS is drive based, not partition based. and Mojave won't allow you to format an SSD with "OS X extended" Spinning hard drive only will have that option. and non-system disks
     
  3. Fishrrman macrumors P6

    Fishrrman

    Joined:
    Feb 20, 2009
    #3
    "As for format, you won't really have much of a choice after install as it will be APFS being an SSD."

    Nope.

    I have Mojave set up and running on an externally-connected (USB3) SSD, formatted to HFS+.
    Boots fast.
    Runs fine.
     
  4. Tech198 macrumors G5

    Joined:
    Mar 21, 2011
    Location:
    Australia, Perth
    #4
    Since its SSD auto converts to APFS on install anyway, i assumed it was *all* ssd's.. Perhaps its only the internal. On mine its that way..
     
  5. DeltaMac macrumors G3

    DeltaMac

    Joined:
    Jul 30, 2003
    Location:
    Delaware
    #5
    Yes, it's all drives, even HDDs.
    Unless you convince the installer otherwise - the Mojave installer changes the format of the destination partition to APFS, even if there are other non-APFS partitions on the drive. I installed Mojave on an external HDD (spinner), where I have several older macOS systems installed. There's a total of ten partitions on that drive. The Mojave partition is now APFS. The other partitions remain as HFS+, all on the same hard drive. All continue to boot just fine on Macs that support them. Oldest is Leopard. Latest is now Mojave.
     

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4 October 20, 2018