Do you know what kind of things it requires in 10.3? I have ported a few things from 10.3 to 10.2 with eternal libraries, so i'll cross my fingers...
AFAIK the shared memory communication doesn't work as needed before MacOS 10.3. You may get the client to compile, but I wouldn't expect it to work properly in the end.
I also know that Charlie Fenton (who maintains the BOINC port for the Mac) spent quite some time on trying to make it run on 10.2 (and he is quite a skilled Mac programmer), but still in vain.
BM
