Disable Airplay on Mac because of too many Airplay devices

Try Disable AirPlay Mirroring in your terminal

sudo chmod 000 

/System/Library/CoreServices/AirPlayUIAgent.app/Contents/MacOS/AirPlayUIAgent

To turn it back on

sudo chmod 755 

/System/Library/CoreServices/AirPlayUIAgent.app/Contents/MacOS/AirPlayUIAgent

Here is the list of Ports used by Airplay

source

AirPlayXPCHelper /usr/libexec/AirPlayXPCHelper was hammering port 7000 on my local network. Port 7000 is not documented in Apple's who's who of ports and usage:

https://support.apple.com/en-us/HT202944

I found it using a light duty application network access monitoring and application firewall software package called Radio Silence.

Radio Silence is an all or nothing easy interface for process network access monitoring. https://radiosilenceapp.com. For those that find Little Snitch or HandsOff! a little too complex or overwhelming in the settings, this is a quick and dirty tool with a clean interface.