A macOS Shortcut that ejects all connected external disks using a shell script and diskutil. I liketo put this one on my Stream Deck

This shortcut uses the built-in Run Shell Script action in the Shortcuts app to detect and eject all mounted external disks.

IFS=$'\n'
disks=$(diskutil list external | grep -o -E '/dev/disk[0-9]*')
for disk in $disks; do
  diskutil unmountDisk $disk
done

• diskutil list external — lists all connected external disks.
• grep filters the output to extract only the disk identifiers (e.g., /dev/disk4).
• Each disk is safely unmounted using diskutil unmountDisk.

1. Open the Shortcuts app.
2. Create a new shortcut and add a Run Shell Script action.
3. Paste the script above into the action.
4. Optionally:

• Set the shell to bash
• Set input to “None”
• Set “Pass Input” to “to stdin”

5. Name your shortcut something like Eject All Disks.
6. (Optional) Add it to your menu bar or assign a keyboard shortcut for quick access

• You may be prompted to give the Shortcuts app or Terminal full disk access or permissions to control your Mac.
• This shortcut only affects external disks. Internal drives are unaffected.

This project is released under the MIT License.