Why should I allow the access to Microphone when mirror to Roku with system audio?

To be able to mirror screen to Roku with system audio. you should allow the access to the microphone after install Omi Mirror Audio Driver and enable audio when mirroring. It don't actually use the microphone on your Mac, it just take the system audio of your Mac to sent to Roku.

If you choose "Deny" at the first time, to make the sound work on Roku , you should allow accessing microphone manually:

1.Please open "System Preferences" and go to "Security & Privacy"

2.Select "Privacy" Tab, then choose "Microphone" on the left side.

3.Check the Omi Mirror app on the right table list.