If it isn't working, there may be a couple reasons why. Reason 1: i use "the unarchiver" to unzip files, and you might need to use that. number(more like step) 2, if it says something about unidentified developers, go to settings, then privacy and security, then scroll down. At the bottom you should see a thing that says "(application) was blocked because it was from an unidentified developer". Click "open anyway", then click open. It should work then. Hope this helps!