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Fusion Drive on Windows: why it is hard to read

Some iMac and Mac mini models have a Fusion Drive. If yours died and you took the drive out, or you want to read it from Windows, it helps to know what a Fusion Drive really is.

Two drives, one volume

Apple: "Fusion Drive, a storage option on some iMac and Mac mini computers, combines a hard drive and flash storage in a single volume for improved performance and storage capacity" (Apple Support, checked October 30, 2026). macOS decides which parts of your files live on the fast flash storage and which on the hard drive. Neither drive on its own holds complete files.

What that means on Windows

  • Diskferry does not support Fusion Drives in this version, with both drives or with one of them.
  • Paragon APFS for Windows is no option either: its APFS page says the driver "can only work with APFS containers residing on a single physical store" (Paragon).
  • The Linux tool apfs-fuse states that it "also supports software encrypted volumes and fusion drives", with an option to name the second device. That means booting Linux with both drives connected.

The practical routes

  1. If the Mac still starts, copy your files to an exFAT drive from macOS. That is by far the easiest.
  2. If it does not start, both drives are needed together. A data recovery service, or Linux with apfs-fuse if you are comfortable with it.
  3. If the Fusion Drive was split (Apple: it then appears as two drives), each part may hold a separate volume; Apple's article explains how to tell.

For ordinary single drives from an older Mac, see getting files off an old Mac's drive.

Questions

Does my iMac have a Fusion Drive?

Apple's article says that when you list the drives, one of them "should be labeled Flash Storage, with a capacity of 24 GB, 32 GB, or 128 GB". If your iMac or Mac mini has that flash part plus a hard drive, it has (or had) a Fusion Drive.

Last updated October 30, 2026. Still stuck? Support replies in person.

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