That’s a good suggestion—I decided not to use MPW because the CodeWarrior compilers are better, the CodeWarrior UX is better, etc. For now, I’d rather drop 128K

That’s a good suggestion—I decided not to use MPW because the CodeWarrior compilers are better, the CodeWarrior UX is better, etc. For now, I’d rather drop 128K support and keep using CodeWarrior. The binaries work just fine on Macs with the 128K ROM (like the Mac Plus), and there are a number of additional difficulties you face when developing for 64K ROMs. Some of the other difficulties—no MaxApplZone, the segment manager behaves differently, and if you really want Mac 128K support, you have to copy to an MFS formatted disk. Some versions of the OS ship with broken MFS implementations, presumably because nobody cared whether it worked. I suspect that the segment manager behavior is a particularly thorny issue because it affects the location of code segments in memory, and you have to be careful when you only have 128K.