Apple TV connect to iMac 5K. How?

Both on the same WiFi

Itunes lib on mac set to share

Macs firewall set not to block shared lib

Router set not to block ports required by shared lib

Hi

I have no setting Shared Lib in the fire wall. (Have one saying Sharing)

Does not have any affect.

Mirroring works if I turn off Fire Wall

It is just Mirroring that does not work with FireWall On

How can I add "Shared Libs" to "Accept incoming ..."

this page show what yours airplay require to be allowed

TCP and UDP ports used by Apple software products - Apple Support

use a ctrl + f and type in airplay then you can see which ports needs to be allowed both by the router and by your firewall