diff --git a/Delta.xcodeproj/xcshareddata/xcschemes/Delta.xcscheme b/Delta.xcodeproj/xcshareddata/xcschemes/Delta.xcscheme
index fd69861..1d7c447 100644
--- a/Delta.xcodeproj/xcshareddata/xcschemes/Delta.xcscheme
+++ b/Delta.xcodeproj/xcshareddata/xcschemes/Delta.xcscheme
@@ -123,6 +123,13 @@
             isEnabled = "YES">
          </CommandLineArgument>
       </CommandLineArguments>
+      <EnvironmentVariables>
+         <EnvironmentVariable
+            key = "OS_ACTIVITY_MODE"
+            value = "disable"
+            isEnabled = "YES">
+         </EnvironmentVariable>
+      </EnvironmentVariables>
       <AdditionalOptions>
       </AdditionalOptions>
    </LaunchAction>