Is my screen being shared?! With whom? For the last few days I've been getting a message on my lock screen


  Unlocking with Apple Watch is not available while your screen is being shared




A tad worrisome but I sort of disregarded and chalked it up to maybe a go2meeting screenshare not properly telling the os it's done or my some bug related to my secondary monitor being attached.

But I got it this morning after a full restart and without my secondary monitor attached. Now I'm kinda worried! Is my screen being shared with someone?! How would I even know?!

note that screen sharing is off:
There may be a less drastic explanation for this. I had the exact same issue and found that this happens after using slack for calls where I share my screen. So just restart slack after your call has ended. Haven't tested it with other screen sharing software yet.

Some ones to watch are the obvious, Zoom, BlueJeans, Microsoft Teams, Google, as well as all manner of remote support apps that don't necessarily use Apple's Screen Sharing controls in system preferences.