adif.plugin = Korg USB MIDI driver

[Update 2019-12-14] According to the macOS Catalina support for KORG/VOX Products article on the Korg website, the default Apple driver with macOS Catalina will support the device. The article gives instructions for removing the old driver.


macOS Mojave is giving warnings about 32-bit software as the next version, which is macOS Catalina, will no longer support 32-bit software.

I’ve been able to determine what software relates to each warning except for one – “adif.plugin”. No amount of Googling helped (I don’t have any amateur radio software installed), but I finally figured it out today. To help others who might be Googling for this, here is the answer.

It belongs to the Korg USB MIDI driver that was installed to provide MIDI support to some piece of Korg hardware. In my case, it was the nanoKONTROL2, but the driver is generic and used for a lot of their hardware.

The last update for macOS (as of this writing) is version 1.2.5 r2 released on 2019-02-21. I don’t know if there are plans for a new version, but hopefully anyone searching for “adif.plugin” will now know that it is used for Korg USB MIDI.

If you want to verify this yourself, you can with these steps.

  1. Open Finder
  2. Go to the /System/Library/Extensions/adif.plugin folder using the Go > Go to Folder menu, or ⇧⌘G keyboard shortcut.
  3. Open the context menu for adif.plugin (right click or Ctrl-click) and select Show Package Contents.
  4. Inside the Contents folder will be an Info.plist file. Hit the space-bar to preview the file. You will see references to Korg USB MIDI listed.

My Audioquest DragonFly Red works on macOS High Sierra again!

I don’t know what Apple is doing with audio timing in macOS High Sierra, but they have serious quality control issues in this area. See my post on Avid S3L-X, AVB, and macOS High Sierra for other troubles I’m having.

When Apple released 10.13.2, my Audioquest DragonFly Red started having strange issues. Similar to the clicking issue with AVB, I was having strange timing issues that sounded like phasing, almost like the individual waveform samples were being triggered at a different clock rate than the audio device. It wasn’t constant, but frequent and annoying enough that I gave up using the device. I wasn’t the only one having the issue.

In any case, 10.13.4 fixed my Dragonfly issues, so I’m again happy.

Avid VENUE S3L-X, AVB, and macOS High Sierra

Long story short, if you need use an Avid S3L-X with macOS and playback via AVB, do not install macOS High Sierra. macOS Mojave works fine, as does the older macOS Sierra, but High Sierra has clocking issues that manifest as constant clicking during playback, rendering the audio unusable.

If all you need to do is record via AVB, macOS High Sierra works without issue.


Note, all versions of macOS High Sierra through 10.13.6 are affected.

[Update 2019-03-03] I continue to have no problems with macOS Mojave (currently 10.14.3).
[Update 2018-09-29] Preliminary testing with macOS Mojave (10.14.0) and 64-channel recording and playback indicates that the AVB problems have been fixed.
[Update 2018-07-28]
Increased affected versions to 10.13.6.
[Update 2018-06-05]
Increased affected versions to 10.13.5.
[Update 2018-03-31]
Increased affected versions to 10.13.4.