Cloned https://github.com/antirez/dump1090, ran make, ran `./dump1090 --interactive --net` and BOOM, ADS-B on my Mac with a whip antenna on RTL-SDR v4 (v3 might be better, better antenna would definitely be better).

Radio is magical. Need to figure out what flight platform to send to.

GitHub - antirez/dump1090: Dump1090 is a simple Mode S decoder for RTLSDR devices

Dump1090 is a simple Mode S decoder for RTLSDR devices - antirez/dump1090

GitHub
@geerlingguy uh, nice. and yeah, there was some schism going on in the adsb-scene a while ago between https://www.adsbexchange.com/ and https://adsb.fi/ — please let us know what you find when taking the deep dive :)
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ADS-B Exchange
@geerlingguy @yetzt AFAIK both of those two are involved in drama and are not recommended to be used. Airplanes.live is the successor set up by the former engineers of the other two and is constructed to be open and with stronger leadership