diff --git a/rtc_base/format_macros.h b/rtc_base/format_macros.h
index 7252f2ea74..0466770de5 100644
--- a/rtc_base/format_macros.h
+++ b/rtc_base/format_macros.h
@@ -43,34 +43,6 @@
 #define PRIuS "zu"
 #endif
 
-// The size of NSInteger and NSUInteger varies between 32-bit and 64-bit
-// architectures and Apple does not provides standard format macros and
-// recommends casting. This has many drawbacks, so instead define macros
-// for formatting those types.
-#if defined(WEBRTC_MAC)
-#if defined(WEBRTC_ARCH_64_BITS)
-#if !defined(PRIdNS)
-#define PRIdNS "ld"
-#endif
-#if !defined(PRIuNS)
-#define PRIuNS "lu"
-#endif
-#if !defined(PRIxNS)
-#define PRIxNS "lx"
-#endif
-#else  // defined(WEBRTC_ARCH_64_BITS)
-#if !defined(PRIdNS)
-#define PRIdNS "d"
-#endif
-#if !defined(PRIuNS)
-#define PRIuNS "u"
-#endif
-#if !defined(PRIxNS)
-#define PRIxNS "x"
-#endif
-#endif
-#endif  // defined(WEBRTC_MAC)
-
 #else  // WEBRTC_WIN
 
 #include <inttypes.h>