As of svn rev 4794, midas builds, runs and should be fully usable on MacOS 10.6.4. Previous revisions did 
not compile due to assorted Linuxisms and did not run because of a sizeof() problem in ss_gettid(). Also 
one of the system header files (mtio.h?) present in MacOS 10.5 vanished from 10.6.

Please continue reporting all problems with midas on macos to this forum.
K.O.