Simply follow the 10 step installation guide found here:
To install Realtime-Spy's configuration software onto your Mac, run the Realtime-Spy Setup package. This will install the Realtime-Spy Configuration app to your Applications\Realtime-Spy\ folder.
Once you have installed the software jump to the next step: Configuring
By installing Realtime-Spy you agree to the standard legal disclaimer
and EULA specified HERE.
Realtime-Spy must only be installed on a Mac that you own, or you
have permission to install it on. Doing otherwise is a legal offense
in most states/countries.