You will need full ghillie and a friend on a strong fighting mount to keep the area clear of strong aggressive dinos. Also DO NOT attempt to cage before taming. He will only take one beer while in a cage, might be a glitch that will be patched but we tested it 4 times. On the 5th we released him and it worked perfectly.
To tame this creature you have to passively tame it, the best way of doing this is to put on a full set of ghillie as that supply's stealth, then you Aproach it from behind crouching and Feed it a beer!