Hi there,
While not an OSX forum, we certainly did experience some of the portability issues that made AP builds tricky. This specifically involves code from the stock application fast folding routines. At the time, some optimisation was needed to be disabled to conserve numerical compatibility with stock and windows 32 bit builds for AstroPulse 5.00 and 5.03.
Raistmer since isolated at least some (hopefully all) of the offending low precision areas, and submitted some fixes to Berkeley, which should appear in the next stock release. The net effect should be to make the entire stock and optimised codebases more portable to Linux, OSX, 64 bit, and possibly other platforms, without sacrificing optimisation for future builds.
Jason