airplay displays off - no option to turn on
I am trying to set up the ability to connect to airplay via the top menu bar.
Considering what is written below - what else do I need to do to add the ability to connect to Airplay via an icon in the menu bar?
I am running High Sierra now.
I have gone into system preferences>displays.
I have ticked the box that says 'Show mirroring options in the menu bar when available.
However the drop down menu within system preferences>displays says that Airplay Display is OFF and does not have an option to switch it on.
There is an airplay device on and available.
When I go to System Preferences>sound the existence of an airplay device is confirmed
Following apple support advice / forum answers, i have performed the following already:
- update both iMac / Apple TV to the latest software version
- confirmed no device restriction applied by Apple TV
- confirmed mirror airplay function works well in my other device including my macbook pro / iphone se
- confirmed subject iMac has switched off all anti virus / firewall in the subject iMAC already
- confirmed subject iMac and apple tv are connecting the same wifi network with strong wifi signal
- confirmed subject iMac mirror display option is not available in safe mode / by guest login too
- tried reinstallation MacOS already (problem exists in Sierra, and remains after updating to High Sierra)
Could you please advise what else i need to do to enable the mirror display in my subject iMac again? Thanks
iMac 21.5″, macOS 10.13