Andrea Audio Software for Mac provides the audio filters and an intuitive graphic user interface for Andrea USB audio devices running on Apple Macs.

Important install instructions:

Installing the software with High Sierra and Mojave,

The first time you install, the OS will ask if it is okay to run the extension. So while doing this, the user gets the following message:

At this point the user should push the “Open Security Preferences” button, which takes you to the following page in system preferences (the user could also just open Preferences to this page).

The user needs to push the “Allow” button.

However, if the user just pushes “OK” in the first message and doesn’t go to Preferences and push the “Allow” button, this “Allow” option disappears after 30 minutes, never to appear again, leaving the system in a state where the Andrea noise reduction filters are disabled. 

Then when the user opens the audio control GUI it states “No USB audio device is attached”.

Solution:

If the user didn’t push the “Allow” button, they can get the “Allow” button to reappear by re-installing the software.

When they re-install, they will NOT get the first message again, but if they go into Preferences within 30 minutes, they can push the “Allow” button to continue with a successful installation.