Remove several warnings when building the project

Signed-off-by: Yihe Li <winmikedows@hotmail.com>

launcher/tools/MCEditTool.cpp

@@ -45,7 +45,7 @@ bool MCEditTool::check(const QString& toolPath, QString& error)
 
 QString MCEditTool::getProgramPath()
 {
-#ifdef Q_OS_OSX
+#ifdef Q_OS_MACOS
     return path();
 #else
     const QString mceditPath = path();