jettison ☆
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Description:
Automatically ejects external drives
Type: Cask  |  Latest Version: 1.9.5@0  |  Tracked Since: Dec 28, 2025
Links: Homepage  |  @stclairsoft  |  formulae.brew.sh
Category: System utilities
Tags: macos utility automation disk-management productivity
Install: brew install --cask jettison
About:
Jettison is a macOS utility that automatically ejects external drives before your Mac goes to sleep. This prevents the annoying system warning about improper drive ejection and ensures a clean shutdown process. It runs quietly in the menu bar, providing seamless integration with your system's sleep and wake cycles.
Key Features:
  • Automatic ejection on sleep
  • Menu bar interface for easy control
  • Re-mounts drives upon waking
  • Supports both external disks and network volumes
  • Customizable whitelist for drives to keep mounted
Use Cases:
  • Preventing data corruption on external drives when closing a laptop lid
  • Safely disconnecting network shares before sleep
  • Automating workflow for users who frequently move between workstations
Alternatives:
  • UnmountHelper – Free alternative with fewer features and no auto-re-mount
  • Disk Utility – Manual process requiring user intervention every time
Version History
Detected Version Rev Change Commit
Aug 5, 2025 12:06pm 1.9.3 0 VERSION_BUMP 1d513def
Jun 29, 2024 1:52pm 1.8.8 0 VERSION_BUMP 75b68755
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