On Sat, Jun 20, 2026 at 3:02 PM Fred Cisin via cctalk <[email protected]> wrote: > I heard that all of the Lisa OS, and much of Macintosh, were written in > Pascal. > (obviously other than some low-level drivers and performance critical > routines?) > Is that correct? > > http://pascal.hansotten.com/apple-lisa-pascal/
I remember seeing articles about Pascal and the Lisa in 1983, and I definitely read in "Inside Macintosh" (the "hernia manuals") in 1984 that there was a Pascal calling convention for various toolbox functions. As I read it, you were expected to write your apps in Pascal or Assembler. C wasn't an option for me (I didn't start learning it until the following year, on a VAX running UNIX), and I wanted no part in Pascal. Totally put me off developing for the Mac. > When did Macintosh development switch to C? System 7 (early 90s) AFAIK. -ethan
