IronKey S200 OS X Mountain Lion Fix

(Updated 25 November 2016 with updated link.) If you have an older IronKey flash drive, you might be surprised to notice it won’t let you launch the decryption app under OS X 10.8 (“Mountain Lion”). If you have “basic” IronKey like me, you can’t upgrade the firmware either, so you’re out of luck if Imation ever fixes it have to wait for a “restore file” (via Imation’s comment, though their website currently disagrees).  Fortunately, you don’t have to give up your flash drive quite yet.  Follow these steps for a workaround.

  1. Plug in the IronKey and launch /Applications/Utilities/Terminal
  2. In Terminal, figure out which device maps to your IronKey
     $ diskutil list IronKey
     0: CD_partition_scheme *236.0 MB disk4
     1: CD_ROM_Mode_1 IronKey 205.2 MB disk4s0
    • The IDENTIFIER is disk4s0, so the device is /dev/rdisk4s0 (add /dev/r to the IDENTIFIER).
  3. $ sudo chmod +r /dev/rdisk4s0
  4. Type your OS X password and press return

The IronKey decryption app will now open, but you must repeat this every time you plug in the IronKey.

UPDATE: As of 30 January, Imation issued an update to use the the IronKey S200 and D200 devices under Mountain Lion without having to follow the above steps.  To apply the patch, you must be running Windows (who thought that was a good idea?).

Update your IronKey for OS X...via Windows...

The good news is that, after running the “secure updater,” unplugging, replugging, and unlocking under Windows, the IronKey does in fact work correctly under OS X 10.8.2.  I don’t see Imation linking to the patch through its website, but you can download it directly and follow the instructions.

UPDATE 2: I’m pretty sure another 10.8.x update killed this. Seems like we’re sitting on bricks again.

UPDATE 3: I’m now running Mavericks OS X 10.9.1 and plugged in my Iron Key that had been patched as shown above just for giggles. It…worked without a hitch. Moral of the story: upgrade to Mavericks.  It’s free and your Iron Key will likely work again. Note that I’ve since been forced switched to an Aegis Secure Key that uses a hardware-based PIN for encryption instead of a software-based passphrase, but it’s nice to have this hardware back.

UPDATE 4: At some point, my Iron Key stopped working with Mavericks again. Luckily there is another firmware update that fixes it. Download firmware from the Iron Key website (or, direct download). You again need a Windows installation to install the firmware update.

UPDATE 5: Updated direct download link for from DK in the comments.

14 thoughts on “IronKey S200 OS X Mountain Lion Fix

  1. Hi Greg,

    Your information is a bit inaccurate, though the workaround is correct. First, Basic devices can be updated in instances such as this via a restore file, so you’re not “out of luck.” Maybe you could update your posting.

    We’re working on a permanent fix so the chmod command does not need to be run every time prior to unlocking the device. If you email we will be happy to notify you when a permanent fix is available.

    Imation Mobile Security Technical Support

  2. too bad a fix comes from the users instead of the company! thanks for the workaround, hopefully imation can get their act together for MAC users out there

  3. Thanks much for posting this. It’s a shame Imation isn’t willing to admit their mistake (in not providing an update path for Basic devices). There’s no legitimate reason this information is not on their website.

  4. Greg,

    Please remove the download link from your site. It’s not posted publicly because running the utility on another device model can cause undesired results. Thank you.

  5. Greg,

    You can disregard. It’s also posted on an Apple discussion forum that we can’t do anything about. Thanks.

  6. I have:

    About This Device

    Model: IronKey Personal S200 8GB
    Serial Number: 00441311
    Software Version: | Dec 9 2013
    Firmware Version: 2.0.13
    Secure Files: J Drive | Unlocker: E Drive
    OS: Windows 7 SP1 | Windows Admin

    & Mavericks & I’m getting the unsupported device error…. any ideas?… I’ll try work-around later…

  7. @Chris: is working for me with a S200. Maybe try going back into Windows and doing the “Restore Iron Key Apps” option?

  8. I have an S200, 16GB, firmware 2.0.13, running the latest version of Mavericks. Just finished updating to and it does the same as before (“unsupported device”). However, I’ve always quit the app. ejected the device, pulled the device and re-inserted it back into the same USB port and it’s always worked correctly. It’s a pain in the ass to have to insert it twice but at least it works and I don’t have to fire up my work PC to get some info I need.

  9. Got an Ironkey from the VA. No joy with the plug and play on my Yosemite Mac. No way I’m installing Windows to patch this. If the terminal hack doesn’t fix it, it’s going back.

  10. This workaround, sadly, seems ineffective on 10.13.

    (Yes. I’ve been looking to borrow a Windows system I know isn’t compromised. Imagine the trust issues here.)

    Sadfaced little IronBrick.

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