How to safely eject drives on Mac

The simplest method: SeventyEject

Install SeventyEject, plug in your external drives as usual, then click the big « Eject all » button (or use the menu bar icon). Every drive is cleanly unmounted, in sequence, and a checkmark confirms success. If a drive resists, the app says so clearly instead of failing silently: "macOS is holding this drive back (file still open?)".

Download the free SeventyEject trial (7 days, macOS 13+).

Why eject properly instead of just unplugging

• Avoid data corruption: unplugging mid-write can corrupt files, especially on FAT32 or exFAT (USB sticks, SD cards) which don't journal their writes.
• Protect the drive itself: repeated abrupt disconnects can prematurely wear out some external SSDs and disks.
• One gesture for everything: no more clicking each Finder icon one by one, SeventyEject ejects them all at once.

A drive resists ejection: what to do

The most common message is "macOS is holding this drive back": a file, document, or Finder window is still using that volume. Close the apps involved, check that no Time Machine backup is running, then try again. As a last resort, macOS's Disk Utility offers a forced unmount.

Works with Time Machine and mounted network drives

SeventyEject ejects any external volume macOS recognizes as removable or ejectable, including Time Machine backup disks. The one case to avoid: ejecting mid-backup, macOS will warn you if that's happening.

Mistakes to avoid

• Hot-unplugging a drive without ejecting it: the corruption risk grows every time, especially during writes.
• Closing the Mac's lid with a drive still mounted, assuming that ejects it: it doesn't, eject first.
• Ignoring an eject failure message: better to understand why (open file) than to keep retrying blindly.

Get SeventyEject: 7-day trial, then a lifetime license.