Grapher.app is different from Graphing Calculator. It came via an acquisition. All the details are here if you want to read the backstory (assuming the info is

Grapher.app is different from Graphing Calculator. It came via an acquisition. All the details are here if you want to read the backstory (assuming the info is correct: https://en.wikipedia.org/wiki/Grapher https://en.wikipedia.org/wiki/Grapher)