As for Mac OS, Dying Light requirements here start with macOS Sierra 10.12.1 operating system. Processor needs to be at least Intel Core™ i5 @3.20GHz. 4 GB DDR3 of RAM is required. Your graphics card should be AMD Radeon™ R9 M370X (2GB VRAM). Finally, the game needs 40 GB free space of free disk space.
As for recommended OS, it is macOS Sierra 10.12.1. Intel Core™ i7 @4.00GHz processor is recommended. Plus, 8 GB DDR3 of RAM. Your video card should be AMD Radeon™ R9 M395X (4GB VRAM).