#if (defined(__IPHONE_OS_VERSION_MIN_REQUIRED) && (!defined(__IPHONE_6_0) || __IPHONE_OS_VERSION_MIN_REQUIRED < __IPHONE_6_0)) || \
    (defined(__MAC_OS_X_VERSION_MIN_REQUIRED) && (!defined(__MAC_10_8) || __MAC_OS_X_VERSION_MIN_REQUIRED < __MAC_10_8))
#define PT_DISPATCH_RETAIN_RELEASE 1
#else
#define PT_DISPATCH_RETAIN_RELEASE 0
#endif

#if PT_DISPATCH_RETAIN_RELEASE
#define PT_PRECISE_LIFETIME
#define PT_PRECISE_LIFETIME_UNUSED
#else
#define PT_PRECISE_LIFETIME __attribute__((objc_precise_lifetime))
#define PT_PRECISE_LIFETIME_UNUSED __attribute__((objc_precise_lifetime, unused))
#endif

#if (defined(__IPHONE_OS_VERSION_MIN_REQUIRED) && (!defined(__IPHONE_6_0) || __IPHONE_OS_VERSION_MIN_REQUIRED < __IPHONE_6_0)) || \
    (defined(__MAC_OS_X_VERSION_MIN_REQUIRED) && (!defined(__MAC_10_8) || __MAC_OS_X_VERSION_MIN_REQUIRED < __MAC_10_8))
#define PT_DISPATCH_RETAIN_RELEASE 1
#endif

#if (!defined(PT_DISPATCH_RETAIN_RELEASE))
#define PT_PRECISE_LIFETIME __attribute__((objc_precise_lifetime))
#define PT_PRECISE_LIFETIME_UNUSED __attribute__((objc_precise_lifetime, unused))
#else
#define PT_PRECISE_LIFETIME
#define PT_PRECISE_LIFETIME_UNUSED
#endif

--- 
+++ 
@@ -1,12 +1,14 @@
 #if (defined(__IPHONE_OS_VERSION_MIN_REQUIRED) && (!defined(__IPHONE_6_0) || __IPHONE_OS_VERSION_MIN_REQUIRED < __IPHONE_6_0)) || \
     (defined(__MAC_OS_X_VERSION_MIN_REQUIRED) && (!defined(__MAC_10_8) || __MAC_OS_X_VERSION_MIN_REQUIRED < __MAC_10_8))
 #define PT_DISPATCH_RETAIN_RELEASE 1
+#else
+#define PT_DISPATCH_RETAIN_RELEASE 0
 #endif
 
-#if (!defined(PT_DISPATCH_RETAIN_RELEASE))
+#if PT_DISPATCH_RETAIN_RELEASE
+#define PT_PRECISE_LIFETIME
+#define PT_PRECISE_LIFETIME_UNUSED
+#else
 #define PT_PRECISE_LIFETIME __attribute__((objc_precise_lifetime))
 #define PT_PRECISE_LIFETIME_UNUSED __attribute__((objc_precise_lifetime, unused))
-#else
-#define PT_PRECISE_LIFETIME
-#define PT_PRECISE_LIFETIME_UNUSED
 #endif
Synchronize logical grouping of defines
