In my last post I showed you how you can run a software defined radio easily on a Mac OS X Yosemite. In just a few more steps you can also track commercial airplanes in your area with the same device you can buy here (affiliate link) with free shipping.
Install the software
First of all, follow the guide in this post
to install MacPorts, GQRX and the drivers to run the software defined radio.
Once you have done this then download this zip file:
and unpack it
./dump1090 --interactive --net
Then you should see something like this:
And if you open your browser at http://localhost:8080
you can see even an animated map of the constantly updated airplanes: