My wife has a 5k iMac, and we're thinking of just using Airplay (you can share monitors via AirPlay now, I'm not sure when Apple added that). I tested it out t

My wife has a 5k iMac, and we're thinking of just using Airplay (you can share monitors via AirPlay now, I'm not sure when Apple added that). I tested it out the other day and it's relatively OK.