Wireless screen share works on one laptop but not on another

Miracast, AirPlay and Google Cast are three protocols, none of them covers everything. In a mixed Mac-Windows environment this keeps failing unless the receiver speaks all three or you pick a neutral fallback.

Try this first

1. 1List which laptops and mobiles will join, Mac does AirPlay, Windows does Miracast, ChromeOS does Cast.
2. 2Pick a receiver that accepts multiple protocols, for example Barco ClickShare or Mersive Solstice, or accept that guests need a dongle.
3. 3For Teams Rooms and Zoom Rooms, sharing through the meeting app is often more reliable than wireless protocol, it runs over WiFi rather than local broadcast.
4. 4Check the WiFi, some protocols use peer-to-peer on their own radio, others run over the corporate network, this affects guest access.
5. 5Re-test each receiver firmware update, updates sometimes drop protocol support for security reasons.
6. 6Display on the screen or at the door which button to press to share, otherwise every guest will ask.

None of the above fits?

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