[frereubu]

Pretty funny, but it looks like macOS Mojave does this already - there's a "Turn on Do Not Disturb when mirroring to TVs and projectors" setting in System Preferences > Notifications > Do Not Disturb - which might explain that development seemed to stop more than a year ago: https://muzzleapp.com/updates/ Unless there's something else that it does which isn't covered by that preference setting?

[filleduchaos]

Presumably this wouldn't cover screensharing from an app like Slack or Zoom?

[dx034]

And I guess sometimes you're sitting in front of your Mac with others without using any presentation mode. Muting notifications could be really helpful then.

[natdempk]

You can manually turn on Do Not Disturb mode also to accomplish this.

[frereubu]

Ah, yes - that’s what I was missing. Thanks for pointing that out.

[sdoering]

Damn. I didn't know that. thanks an awful lot...

[jedberg]

For future reference, the smart person creates a second login on their machine with no notifications allowed and with nothing logged in for presenting.