I try to run Snagit on MacOS Sierra 10.12.6; found System Audio Uninstalled fix yet when I installed TechSmith_AudioCapture.dmg when I run Snagit and tried to record the problem now is System Audio: Off. When I click Record button it throws an 'Unknown Error'. I have tried to restart Snagit, restart Mac, reinstall TechSmith_AudioCapture. Unknown Error still persists. Any help with this please?