Quick video showing how I am able to play my PS4 through my 2013 27" iMac screen. This is something I wanted to do for a long time and since the iMacs were updated from mini display port to Thunderbolt has not been possible. Any questions just drop a post.
2013 27" iMac, 3.4GHz i5, 8GB, GTX 775M, OS X 10.9.4
This also worked in bootcamp and on my 2012 rMBP