Connor, Pick through the instructions on the ET as the details are there in getting it to work with a serial communication program.
As far as a tracking program you can use on a Mac or any computer for that manner, MapSphere, a Windows, program is the only one
that can show the position on a map of the EggFinder easily. It's not too terribly helpful for tracking as it only keeps track of one NMEA datastream. One can't connect a GPS at the computer to monitor one's position in relation to the rocket in realtime.
Xastir, a ham radio tracking program, will run on a Mac but one almost has to have a handle on Linux to understand it.
https://www.kevinblanchard.com/projects/installing-xastir-on-mac-os-x/
Again, the problem here is the raw NMEA words coming off the EggFinder will only be read as the local station so one can't really use it to track easily. In that regard it's like MapSphere. There is a perl script called gps2aprs.pl,
https://www.ece.uah.edu/~jdw/rockets/gps2aprs.txt that will take the incoming NMEA steam from the EggFinder convert it to APRS and then present it to Xastir and one can track both spots. It's a real pain. A laptop is not so portable when one has to retrieve the rocket and they are not easy to read in the sunlight.
The Ham Radio programs are geared towards the APRS format positions so trying to use them with a device that outputs NMEA is going to be a kluge.
The EF gets the job done.
Essentially, it's simplier to input the lat/long into a handheld GPS and carry the EggFinder LCD along for position updates. Alternatively, use the Android app
GPS Rocket Locator and it will give one the two positions and a datum line to follow. If one has network access via a cell phone, will pull down a google aerial photo.
Kurt