Intego NetBarrier X8

Intego NetBarrier X8 keeps outsiders exactly where they belong: out of your Mac. It provides automatic protection as you move from one location to the next, so whether you're at home, work, or grabbing coffee at your favorite cafe, you'll be safeguarded against strangers and suspicious applications.

Worry-free protection from unknown devices and applications trying to access your files. Location-aware network protection. Quick and easy set up you can customize specifically for your needs.
What's new in this version:
OS X 10.11 El Capitan compatibility