Downloading airControl2 2.1 for Mac from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this app available. The actual developer of this free Mac application is Ubnt. According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software.
From the developer:
airControl2 is a client installation guide for all operating systems. If you need to start up the server however, you can open up terminal and type the following: cd /Applications/AirControl/Contents/MacOS./aircontrol2-server start. To use this app you need to install Java.