diff --git a/cpp/xcode/KataGo.xcodeproj/xcshareddata/xcschemes/katago.xcscheme b/cpp/xcode/KataGo.xcodeproj/xcshareddata/xcschemes/katago.xcscheme
index 7e29f77a9..042959e2e 100644
--- a/cpp/xcode/KataGo.xcodeproj/xcshareddata/xcschemes/katago.xcscheme
+++ b/cpp/xcode/KataGo.xcodeproj/xcshareddata/xcschemes/katago.xcscheme
@@ -56,7 +56,7 @@
       </Testables>
    </TestAction>
    <LaunchAction
-      buildConfiguration = "Release"
+      buildConfiguration = "Debug"
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
       launchStyle = "0"