You can download Freedom for OS X 10.8 here - Freedom for OS X 10.8
You can find complete installation instructions here - Install Freedom for OS X
Why do we have a separate release for OS X 10.8?
In 2016, Apple started deprecating support for OS X 10.8. This means that developer libraries that are being produced for the newest version of OS X are no longer compatible with 10.8.
To solve this, we have created a separate release for users of OS X 10.8.
Parity with 10.9+
This version has the same functionality as our clients released for 10.9+. This client is a special release for OS X 10.8. If you are on OS X 10.9 or later, please use Freedom for OS X 10.9+ - it will work more efficiently with your system.
Still on 10.8 and want to upgrade?
It is generally a good idea to upgrade your Mac laptop to the most recent version of OS X. Apple offers a free upgrade to OS X 10.9 and later via the App Store. If you'd like to upgrade, open the App Store, and search for "Mavericks." You can then download and install the upgrade for free.