[tombert]

> Is the ability to fork the essence of what makes a project open source?

Kind of? The ability to "do whatever you want" with the code more or less embodies the experience of FOSS.

> Why did you stop using it?

I got a job at Apple, and roughly three months after I started there that laptop broke and I got a discount on a Macbook. I know I could put Linux on there, and maybe at some point I will, but currently my school requires that we either have a Windows or Mac computer, and since I don't want to go about mucking with virtual machines, I'm sticking with macOS.