We have recently detected an issue with TAC-8 and macOS Mojave Version10.14.5. TAC-8 does not work properly on macOS Mojave Version10.14.5 which was released in May 2019.
If you are currently using TAC-8, we recommend that you do not update to macOS Mojave Version10.14.5 for the time being.
Please check back for updates on this issue.
We apologize for any inconvenience.
About Zoom North America:
Zoom North America is the U.S. affiliate of the Zoom Corporation (Japan). The company prides itself on offering its customers the very highest level of service and support.