1. wkelly24's Avatar
    Hello,

    I've been holding off on upgrading an iMac with a Fusion Drive to High Sierra. What is the recommendation of the iMore team? Is the new file system supporting Fusion Drives yet?

    Thanks,

    Will
    01-17-2018 07:32 AM
  2. anon(9602380)'s Avatar
    Hello,

    I've been holding off on upgrading an iMac with a Fusion Drive to High Sierra. What is the recommendation of the iMore team? Is the new file system supporting Fusion Drives yet?

    Thanks,

    Will
    It sure is. I have a 2015 iMac with 3TB fusion drive and everything is working fine. I upgraded with out any problems.
    01-17-2018 10:34 AM
  3. doogald's Avatar
    High Sierra will not automatically upgrade to the new file system APFS on Fusion drives, and Apple recommends staying on HFS+ on Fusion drives (which it will when you upgrade) and using APFS only on SSD and other all flash storage drives for now.

    See https://support.apple.com/en-us/HT208033

    I personally have not tried HS on a Fusion drive with HFS+, but, as noted above, it should run fine.
    Last edited by doogald; 01-17-2018 at 12:00 PM.
    01-17-2018 10:44 AM

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