Why not Mach as MacOS 8.0??

[3929]

Hmmm, I forgot to cross-post this to this newgroup when I posted to
comp.sys.mac.programmer.  Sorry for the duplication.

Okay, perhaps someone can answer me this question:  why not use an
implementation of Mach as verrsion 8.0 of the MacOS?  It would seem that you
could preserve the shared memory areas via Mach's shared virtual memory through
VM inheritance (e.g. don't copy-on-write but inherit a shared chunk of VM).
This would allow the large majority of Mac programs which do twiddly things
in the system heap and such to still run correctly.

I guess I'm interested in hearing what the problems are (I'm sure there are
at least a few).


Thanks,
Brian R. Gilstrap
uucibg at swbatl.uucp OR ...!{ texbell, uunet }!swbatl!uucibg