Airport Alerter 1.1 for Mac can be downloaded from our website for free. Airport Alerter for Mac lies within Internet & Network Tools, more precisely Network tools.
From the developer:
Airport Alerter alerts you with an customizable sound and an optional dialog when your Airport Signal goes below the level of your choice. Also optionally alerts (with different sounds) when you lose or make an Airport Connection
You may want to check out more software for Mac, such as Airport-Firefighter-Simulator, Airport Mania: First Flight or toggle-airport, which might be similar to Airport Alerter.
Simulation
Remote Computing