In order for you to play Subnautica: Below Zero on macOS with minimal graphics settings, your computer must meet the following requirements
Operating System:
OS X 10.11 El Capitan
Processor (CPU):
Intel Core i5
Memory (RAM):
8 GB RAM
Graphics Card:
Intel Iris Pro 650 or better
Storage:
15 GB available space
In order to play Subnautica: Below Zero on macOS with maximum graphics settings, you need a computer with a configuration no worse than the following
Operating System:
OS X 10.13 High Sierra
Processor (CPU):
Intel Core i7, 4 cores
Memory (RAM):
8 GB RAM
Graphics Card:
AMD Radeon R9 M395 or better
Storage:
15 GB available space