Jettison
Jettison
1.7.4

4.5

Jettison free download for Mac

Jettison

1.7.4
13 September 2019

Ejects external disks when you put your Mac to sleep.

Overview

Jettison automatically ejects external disks from your Mac before your computer goes to sleep.

Simplify those last few seconds when you grab your MacBook and run out the door. Just close the lid and Jettison will automatically eject your backup drive, iPod, or whatever is connected so you can safely unplug it. Say goodbye to "disk was not ejected properly" errors and waking your computer back up because you forgot to eject everything.

Jettison even makes sure that Time Machine backups and file server volumes are properly shut down before they're removed. Your backups and shared files are safe and sound.

And what if you decide not to leave, and open your MacBook back up? Jettison will check to see if your drives are still connected and will mount them back on the Desktop if they're there.

What's new in Jettison

Version 1.7.4:
  • Corrected two crashes that could occur when using encrypted volumes or when running on versions of macOS prior to 10.14.4.

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14 Jettison Reviews

See all

Rate this app:

gatovadio
31 March 2012

Most helpful

It would be a nice addition to auto quit apps which are in use by some disks (media players or wallpaper switchers which don't even require me to save my work before quitting).
Like (3)
Version 1.2
Cowicide
01 June 2017
Love Jettison. It's never failed me once.
Like
Version 1.5.3
AppleFriend
31 August 2016
Jettison is very helpful app in modern high-speed world. It's so exhausted to eject any hard drives or other devices from a laptop before you quickly close a lid and need to hurry somewhere. Jettison is the right thing to have in this case. So, download this cheap useful app and enjoy it assistance.
Like (1)
Version 1.5.1
Scott-C-H-
03 June 2016
Excellent utility. It's one of those utilities that you take for granted until you use someone else's Mac. It runs quietly in the background and does its work while staying out of the way. The developer is also very responsive and helpful.
Like (1)
Version 1.5
Dana_Nau
05 July 2015
I'm not sure whether the hotkeys were added in version 1.3 or 1.4 -- but now that they're there, I'm happy to give Jettison 5 stars. Two detailed comments, in case they might help anyone: (1) For me, Jettison has one *big* advantage over Mountain. When I reawaken my laptop, Jettison is smart enough to remount only the disks that were mounted when I put the machine to sleep. Mountain mounts everything that's connected to the machine -- which in my case includes some backup partitions that I don't want it to mount. (2) There's a glitch in the instructions on the Jettison website for upgrading from the Mac App Store version to Jettison 1.4.3. The website says to start by launching Jettison from the disk image so it can retrieve the registration info from your copy of the Mac App Store version; and that part works fine. But then Jettison will offer to copy itself from the disk image to your Applications folder -- if you tell it to go ahead, it will silently fail. The work-around is to tell Jettison to quit, then remove the old version from the Applications folder, then copy the new version manually.
Like (1)
Version 1.4.3
1 answer(s)
Dana_Nau
Dana_Nau
07 July 2015
An update on item (2) above: from what the developer has told me, I believe what I described was was largely due to an idiosyncrasy of my computer configuration, hence is unlikely to be a problem for most people.

Very responsive developer, by the way.
Like (2)
DanDaf
25 February 2015
Used to work OK, with some flaws every now and than. But since a few weeks it's nothing but trouble. Unmounts my 128 GB Nifty (however it says it can't), but fails to remount the disc. Only a restart helps to remount the disc. I am using 1.4.3 on OSX 10.10.2
Like (1)
Version 1.4.3
1 answer(s)
gotow
gotow
09 July 2015
Please try this build and let me know at jettison@stclairsoft.com whether it works for you: http://www.stclairsoft.com/download/Jettison-1.5b7.zip
Like
Tomq
10 December 2014
Great for my needs: which is to be able to eject and remount my external disks quickly and easily using applescript apps I created. Lots of extra options which may be more useful for others.
Like
Version 1.4.3
1 answer(s)
Tomq
Tomq
12 December 2014
Oh, I will add that I never put my MacPro to sleep; my experience is there have been too many conflicts doing that. I just use the screen saver and leave it on all the time.
Like
Philosopherdog
28 August 2014
Look in the FAQ if you bought this via the MAS. To do a free update, download from the dev's site. Run the trial version for the dmg with the MAS installed. This copies the license over. Then just copy over the trial version and it will be licensed. The MAS version is pretty broken. So worth doing.
Like (1)
Version 1.4.1
sambear1965
16 February 2014
Which version is recommended? 1.3 from St.Clair Software website or 1.2.4 from Apple App Store, sorry if this is a dumb question, but why are there two versions available concurrently, Thanks! Running 10.9.1
Like
Version 1.3
Ken-Burns-Effect
27 May 2013
Only costs 1.99 USD in Mac App Store! Just bought it since my Time Machine drive crashed for not ejecting properly.
Like
Version 1.2.4
2 answer(s)
Pablo-The-Innocent
Pablo-The-Innocent
18 December 2013
Still doesn't do the job . Time Machine disk will not mount after sleep. iMac Core i7 Fusion Drive ( late 2013)
Like
Jakob-joergensen
Jakob-joergensen
19 August 2014
Hi Ken, Jake here from EU.
I've had the same issue, and super solved it with this little app: http://www.macupdate.com/app/mac/43428/mountain

J
Like
Drdul
27 November 2012
For the most part, Jettison works, but it isn't able to eject a disk if it's "in use." As gatovadio notes below, often what qualifies as "in use" is an app that is not actively reading or writing. There's no ability to quit apps, or to run an Applescript that could quit chronic offenders. A lot of the time I end up having to manually eject one of my disks. I'm going to give unDock a try, as the new version offers more features than Jettison, even if it doesn't (yet) trigger on sleep.
Like (1)
Version 1.2.4
3 answer(s)
gatovadio
gatovadio
06 December 2012
I just found that the oldie SleepWatcher is updated to work from 10.3 to 10.8. I haven't played with it but it should allow even more freedom than both these apps, with endless scripting possibilities. http://www.bernhard-baehr.de/
Like
gatovadio
gatovadio
13 December 2012
Or EventScripts http://www.macupdate.com/app/mac/44822/eventscripts
Like
St. Clair Software
St. Clair Software
30 October 2013
It's not safe to eject a drive while there's a file open on it, even if you're not actively reading or writing to the file at the time (and OS X will not allow it). Think of it this way: If you open a spreadsheet in Numbers and then put your Mac to sleep, when it wakes up Numbers expects to be able to read whatever data it needs to refresh its windows, save changes, etc. If the file is suddenly gone, you've got a data integrity problem.
Like (1)
$4.95

4.5

App requirements: 
  • Intel 64
  • OS X 10.8.0 or later
Developer Website: 
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