Apple's dev environment was MPW - Macintosh Programmer's Workshop - which provided a Unix-ish command-line environment within a text editor, if that makes sense

Apple's dev environment was MPW - Macintosh Programmer's Workshop - which provided a Unix-ish command-line environment within a text editor, if that makes sense. Ot included Asm, Pascal, C (later C++) and Rez compilers as well as common utilities. Some GNU utilities were also ported over.