diff --git a/SDWebImage/SDWebImageCompat.h b/SDWebImage/SDWebImageCompat.h
index 58f443cd..629db1bc 100644
--- a/SDWebImage/SDWebImageCompat.h
+++ b/SDWebImage/SDWebImageCompat.h
@@ -13,10 +13,9 @@
     #error SDWebImage does not support Objective-C Garbage Collection
 #endif
 
-// Apple's defines from TargetConditionals.h are a bit weird.
 // Seems like TARGET_OS_MAC is always defined (on all platforms).
-// To determine if we are running on OSX, we can only rely on TARGET_OS_IPHONE=0 and all the other platforms
-#if !TARGET_OS_IPHONE && !TARGET_OS_IOS && !TARGET_OS_TV && !TARGET_OS_WATCH
+// To determine if we are running on macOS, use TARGET_OS_OSX in Xcode 8
+#if TARGET_OS_OSX
     #define SD_MAC 1
 #else
     #define SD_MAC 0