What is the small microphone icon floating on top of the screen in macOS and how do I turn it off?
Solution 1:
It's the dictation feature of macOS -- it allows you to speak to the computer and have the spoken words translated into text input and actions. To turn it off go to: System Preferences > Keyboard and press the Dictation tab:
You'll see an option to disable it from there.
- https://support.apple.com/en-us/HT203085
Solution 2:
This microphone floating on your screen IS NOT the dictation feature. It is the Voice Control.
Go to System Preferences > Accessibility
Scroll down until you see "Voice Control"
Disable Voice Control.