atv3 not seeing imac
atv3 not seeing my imac since i upgraded to iTunes 12.2.1. No trouble in the past.
Apple TV, Mac OS X (10.6.8)
The following article(s) may help you.
Troubleshooting Wi-Fi networks and connections
Wifi Diagnostic Software (for Mac users)
You may also find some help on this page, where I’ve collected some of the more unusual solutions to network issues.
When making adjustments to your network for better optimisation, you may find some of the points mentioned on this page helpful.