How do I ensure my Mac is not sending data to Apple or programmers
You can:


Go to System Preferences > Security &amp; Privacy. 
Select the Privacy tab. 
Choose Diagnostic &amp; Usage from the list on the left. 
Make sure the 2 checkboxes on the right are clear.


You can also choose other options from the list on the left (e.g. the Location Services one) to make sure your other privacy settings are okay.