This app started from our retro programming study group[1] where we're going through the 1992 book "Macintosh C Programming Primer" (come jump in anytime!). Some of us are using real machines (we collect them, also I'm working with SCSI so I need real hardware) or you can grab a premade image and start coding. There's also gcc cross compiler Retro68[2] where you can develop on a modern machine.
[1] https://tinkerdifferent.com/threads/study-group-0-getting-yo... [2] https://github.com/autc04/Retro68