In the player on macOS.
See Also: RuntimePlatform, Platform dependent Compilation..
if (Application.platform == RuntimePlatform.OSXPlayer) Debug.Log("Do something special here!");
using UnityEngine; using System.Collections;
public class ExampleClass : MonoBehaviour { void Example() { if (Application.platform == RuntimePlatform.OSXPlayer) Debug.Log("Do something special here!"); } }