Bridge & your devices · Privacy & security
How do I stop other Macs from connecting to my Mac?
Short answer: In the Devices tab, open Share with another Mac and click Stop sharing — your connection code is turned off and your shared folders stop being offered. Forget any Mac you've already paired to cut it off.
In the Devices tab, open Share with another Mac and click Stop sharing. That turns off your Mac's connection code and stops sharing the folders you'd offered, so no new Mac can pair with it until you choose Allow a new Mac to connect again.
Every new Mac also needs your Confirm before it's paired. To cut off a Mac you've already paired, click Forget on its row.