fix(macOS): failing build due to missing TARGET_OS_OSX

apple/RNCWebView.m

@@ -190,6 +190,7 @@ - (instancetype)initWithFrame:(CGRect)frame
   return self;
 }
 
+#if !TARGET_OS_OSX
 - (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {
     // Only allow long press gesture
     if ([otherGestureRecognizer isKindOfClass:[UILongPressGestureRecognizer class]]) {
@@ -225,6 +226,8 @@ - (void)startLongPress:(UILongPressGestureRecognizer *)pressSender
     }
 }
 
+#endif // !TARGET_OS_OSX
+
 - (void)dealloc
 {
   [[NSNotificationCenter defaultCenter] removeObserver:self];
@@ -433,7 +436,7 @@ - (void)didMoveToWindow
     [self setKeyboardDisplayRequiresUserAction: _savedKeyboardDisplayRequiresUserAction];
     [self visitSource];
   }
-
+#if !TARGET_OS_OSX
   // Allow this object to recognize gestures
   if (self.menuItems != nil) {
     UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(startLongPress:)];
@@ -444,6 +447,7 @@ - (void)didMoveToWindow
     longPress.cancelsTouchesInView = YES;
     [self addGestureRecognizer:longPress];
   }
+#endif // !TARGET_OS_OSX
 }
 
 // Update webview property when the component prop changes.