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When I eject the hard drive, the disk starts to slow down but then the disk starts spinning at full speed about a second later. The hard drive is not mounted but it is still spinning. I’m afraid to unplug it when it’s in this state. If I wait about 10 minutes, it eventually stops spinning. I’d rather not have to wait around that long.

This only started happening about a month ago. It might have been due to a software update but I’m not sure. Why is this happening and how do I fix it?

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  • If the disk has been ejected successfully, I don't think you should be afraid to unplug it. – nekomatic Apr 25 at 12:18
  • @nekomatic I can still hear the read-write head moving. – Kerndog73 Apr 25 at 12:19
  • Technically a duplicate of apple.stackexchange.com/q/338166/45492 – n1000 Apr 25 at 14:02
  • It is safe to disconnect. If you hear the read-write head the disk is doing some internal data management which should be fail-safe. – n1000 Apr 25 at 14:12
  • @n1000 I guess I'll take your word for it. This wasn't happening before updating to Mojave. I'd prefer the disk power down when I eject it. – Kerndog73 Apr 25 at 14:14
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I updated to macOS 10.14.4 and the issue has mysteriously resolved itself. A software update caused the problem and a software update fixed it.

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