To enable the built-in firewall that comes with Mac OS X,select your current version below:
- Mac OS X 10.9 through 10.12 (Mavericks, Yosemite. El Capitan, Sierra)
- Mac OS X 10.8 (Mountain Lion)
- Mac OS X 10.6 and 10.7 (Snow Leopard and Lion)
What version do I have?
Unsure what version of Mac OS X you have? Click the apple symbol in the top left hand corner and select "About This Mac". A window will open and reveal your version number.