30,000 H/S on which algorithm? Which attack mode? How many hashes? How many salts? Hard for us to know if 30 KH/s is correct or not if you don't tell us what you're doing.
The R9 M370X is just a re-branded and underclocked HD 7770 / R7 250X, so 14.9 should work just fine (this is a very low-end GPU, by the way, so it probably won't meet your performance expectations regardless.) If you really can't make 14.9 work, then oclHashcat 1.37 will ship with support for Catalyst 15.7.
Also, I wouldn't recommend doing much cracking on an MBP, or really any other laptop for that matter. They can't really handle the thermals that compute loads generate, especially since in most laptops the CPU and GPU share a common heatpipe and fan.
The R9 M370X is just a re-branded and underclocked HD 7770 / R7 250X, so 14.9 should work just fine (this is a very low-end GPU, by the way, so it probably won't meet your performance expectations regardless.) If you really can't make 14.9 work, then oclHashcat 1.37 will ship with support for Catalyst 15.7.
Also, I wouldn't recommend doing much cracking on an MBP, or really any other laptop for that matter. They can't really handle the thermals that compute loads generate, especially since in most laptops the CPU and GPU share a common heatpipe and fan.