Micro Snitch offers a free, built-in demo mode that provides the same functionality as the full version. The demo runs for three hours, and it can be restarted as often as you like.
Runs on OS X El Capitan (10.11) and later, including macOS Sierra (10.12)
Nightly builds are pre-release versions of Micro Snitch that include the latest bug fixes and feature enhancements.
There is currently no nightly build available.
Are you using OS X Yosemite (10.10)?
Compatible versions are available on our legacy page.