Q: No mirroring option

I have a mid 11 mac, ipad 3 and appletv 3.  I can airplay from my ipad to my ATV3 and from Itunes to ATV3.  How do I stream from mac to ipad3 and from mac to atv3 (this without using iTunes).  All devices are on the same network and same router but different IP DHCP.  When i enter preferences then displays it doesnt offer me an option to airplay and there are no displays listed.  Any help will be greatly appreciated.  Have a nice day.