DeltaSnap 
DriveSync 
DeltaSync 
Choose Noject if...
A stationary Mac with storage that should never be ejected, where you want a hard guard against accidental ejects rather than automatic ejection at sleep.
vs. 
Sleep auto-eject
Updated June 17, 2026
Noject vs. Jettison
Jettison automatically ejects external disks before your Mac sleeps or the display powers off, then remounts the ones still connected on wake, which is handy for laptops you move around. Noject is for stationary Macs where selected storage should stay mounted.
Side-by-side
Features and capabilities
Current as of June 17, 2026
| Capability |
Noject
| Jettison |
|---|---|---|
| Primary purpose | · Prevent accidental ejection of permanently-plugged drives. | · Automatically eject external disks before sleep, remount on wake. |
| Blocks accidental ejection | ✓ Yes. Protected volumes refuse all eject and unmount attempts. | − No. It intentionally ejects drives before sleep. |
| Keeps drives mounted continuously | ✓ Yes. Protected drives stay mounted through sleep and reboots. | − No. Drives are ejected before sleep by design. |
| Auto-eject on sleep | · No. Noject keeps protected drives mounted. | ✓ Yes. This is its core feature. |
| Choosing which drives are affected | · Protect any external or internal non-system volume you select. | ✓ Choose which disk types are managed; exempt or include specific drives. |
| Remembers volumes by UUID | ✓ Yes. Protection is restored automatically on reconnect. | ◐ Tracks which drives to eject around sleep. |
| Platform | · macOS 14 and later. Apple Silicon, signed and notarised. | · macOS 10.13 through 26, Intel and Apple Silicon. |
| Pricing | · Free to download from our website (v1.0), or $5.99 on the Mac App Store for the full version with App Store exclusive features. Lifetime, no subscription. | · $6.95 for one licence ($5.95 each for two or more), with a 15-day free trial. |
Where Noject wins
- Blocks every eject and unmount attempt on protected volumes, whether from Finder, Disk Utility, Terminal, or a third-party app.
- A background agent enforces protection even when the UI is closed, and survives reboots, sleep, and reconnects.
- Remembers protected volumes by UUID and re-arms automatically when a drive is plugged back in.
- One-shot "Eject Once (bypass)" for the rare time you genuinely need to eject, without losing your settings.
- Private by design: no account, no telemetry, and it never reads or writes the data on your volumes.
Where Jettison wins
- Automatically ejects external disks before the Mac sleeps or the display powers off.
- Remounts disks that are still connected when the Mac wakes.
- Eject all disks at once, or manage individual drives, from the menu bar.
- Lets you choose which disk types are managed and exempt or include specific drives.
Best fit
Choose Jettison if...
A laptop you carry between locations, where ejecting external disks before sleep protects them while the machine is asleep or in transit.
FAQ
Common questions
Is Jettison an alternative to Noject? +
They target opposite use cases. Jettison ejects drives before sleep so laptops can travel safely; Noject keeps chosen drives mounted and blocks accidental ejects on a stationary Mac. Choose based on whether you want the drive ejected at sleep or kept mounted.
I use a desktop Mac that never moves. Which one? +
Noject. If the machine stays put and the storage should always be available, the value is in preventing accidental ejects, not in ejecting before sleep.
What if I occasionally do need to eject a protected drive? +
Use Eject Once (bypass) for a single unmount, or turn off protection for that volume. Protection resumes automatically afterward.
Sources and methodology +
Competitor capabilities are summarised from their official product pages and documentation. Noject claims reflect the shipping app reviewed on June 17, 2026. Check each developer for current features and pricing.
See an incorrect or outdated claim? Report an issue with this comparison .
Product names and trademarks belong to their respective owners. This comparison is not sponsored by or affiliated with them.
