Best to tame with two people and on a meat run. Have one person on a Rex/giga and one person with a bird. Have the bird pick up the computer then wait until the Rex/giga has enough prime. Once you have enough prime have the person on the Rex hop off tranq the computer then feed it the prime. Make sure to bring narcotics or narco berries!!!
It's not a very good tame when you first get ark, it needs rare meats and you have to watch its torpor. But, if you can get your hands on a lot of narcs and prime fish meat, you can tame a whole lot of these.