cross-platform compatibility

Developers can achieve cross-platform compatibility through various approaches:
Porting: The most common method involves modifying the game's source code and rebuilding it specifically for macOS. This is often necessary when the game uses Windows-specific APIs (like DirectX) that need to be replaced with macOS equivalents (like Metal or Vulkan). Many commercial games are ported by their original developers or specialized porting companies.
Cross-Platform Engines: Modern game engines like Unity, Unreal Engine, and Godot are designed from the ground up to support multiple target platforms. A developer can build a game once using these engines and then export versions for both Windows and Mac with minimal code changes.
Compatibility Layers: End users can run many Windows games on a Mac using compatibility layers, which translate Windows system calls to macOS in real-time. Popular examples include Wine (or services based on it, like CrossOver).