Jettison for Mac

Simplify external-drive workflows on your Mac

Jettison is a lightweight macOS utility that takes the hassle out of managing removable storage. It monitors connected drives and automatically unmounts them when they’re no longer active, helping reduce the risk of corrupted files and ensuring drives are disconnected cleanly. The app is free and designed for quick setup and everyday use.

Main capabilities

Jettison watches for idle or inactive external volumes and ejects them safely without user intervention. It provides a straightforward interface to see which drives are connected and offers options to tweak how the app behaves so it fits your workflow.

Why people use it

• Custom settings let you decide how and when drives are ejected, so the tool adapts to your habits.
• Prevents accidental data loss and minimizes corruption by ensuring proper unmounts.
• A minimal, easy-to-read display makes it simple to monitor all attached storage.
• Free to download and run, so you can try it without financial commitment.

Other options to consider

• Built-in macOS tools — use Finder or Disk Utility to eject volumes manually at no cost.
• Third-party utilities — there are alternative apps (both free and paid) that offer similar automation or extra features.
• Hardware-level solutions — some external enclosures or docks include software or firmware that facilitates safer disconnects.

Who benefits most

If you frequently attach and remove USB, Thunderbolt, or other external drives and want to avoid manual ejection or accidental data issues, Jettison is a practical, low-effort solution to streamline that part of your Mac workflow.