"--append" not always recognized on mac

source/user_guide/helm_settings.rst

@@ -82,7 +82,7 @@ memory
 
     # Start watching
     while true; do 
-        docker stats --no-stream | grep -v "CONTAINER ID" | tee --append shinylogs/stats.txt; sleep 1; 
+        docker stats --no-stream | grep -v "CONTAINER ID" | tee -a shinylogs/stats.txt; sleep 1; 
     done
 
 In the following example, we used the application, reloaded the page and