[macOS] Fix mouse position in captured mode.

platform/osx/display_server_osx.mm

@@ -2041,6 +2041,12 @@ void DisplayServerOSX::mouse_set_mode(MouseMode p_mode) {
 			CGDisplayHideCursor(kCGDirectMainDisplay);
 		}
 		CGAssociateMouseAndMouseCursorPosition(false);
+		WindowData &wd = windows[MAIN_WINDOW_ID];
+		const NSRect contentRect = [wd.window_view frame];
+		NSRect pointInWindowRect = NSMakeRect(contentRect.size.width / 2, contentRect.size.height / 2, 0, 0);
+		NSPoint pointOnScreen = [[wd.window_view window] convertRectToScreen:pointInWindowRect].origin;
+		CGPoint lMouseWarpPos = { pointOnScreen.x, CGDisplayBounds(CGMainDisplayID()).size.height - pointOnScreen.y };
+		CGWarpMouseCursorPosition(lMouseWarpPos);
 	} else if (p_mode == MOUSE_MODE_HIDDEN) {
 		if (mouse_mode == MOUSE_MODE_VISIBLE || mouse_mode == MOUSE_MODE_CONFINED) {
 			CGDisplayHideCursor(kCGDirectMainDisplay);