Downloading AirSurvey 2.3.1 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 program is included in Internet & Network Tools. 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. The actual developer of this software for Mac is Luis Rueda Diez.
From the developer:
AirSurvey is an easy to use tool to make WiFi coverage site surveys.
Optimal coverage in a WiFi network needs a research of the radio strength available in the zones to be provided with the wireless service. This information is obtained performing a wireless site survey, revealing dead zones and helping you to find the best locations for access points.
You may want to check out more Mac applications, such as IPNetShareX, PPPoE Connector or tn3270, which might be similar to AirSurvey.