[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.
Background
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.
- Open Finder
- Go to the
/System/Library/Extensions/adif.pluginfolder using the Go > Go to Folder menu, or ⇧⌘G keyboard shortcut. - Open the context menu for adif.plugin (right click or Ctrl-click) and select Show Package Contents.
- Inside the
Contentsfolder will be anInfo.plistfile. Hit the space-bar to preview the file. You will see references to Korg USB MIDI listed.