diff --git a/mkspecs/macx-xcode/default.xcscheme b/mkspecs/macx-xcode/default.xcscheme
index bd2cb0e5655..170174ed2b5 100644
--- a/mkspecs/macx-xcode/default.xcscheme
+++ b/mkspecs/macx-xcode/default.xcscheme
@@ -26,6 +26,7 @@
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
       shouldUseLaunchSchemeArgsEnv = "NO"
+      disableMainThreadChecker = "YES"
       buildConfiguration = "Debug">
       <Testables>
          <TestableReference