SANE is Standard Apple Numeric Environment, built for the Motorola 680x0. The current Apple processor architecture (Power PC) is different, requires recompilation and may also require some attention to programs.
Some differences:
PPC has double-double but not double-extended.
Whereas SANE may avoid intermediate overflows (by always using wide intermediates) PPCN does not necessarily do so.
Differences in exception handling, round-to-precision, precision of the subroutine library (generally PPCN has lower precision!)
http://developer.apple.com/techpubs/mac/PPCNumerics/PPCNumerics.166.html
The Rhapsody operating system (coming up sometime) is, under the covers, a UNIX system supporting C, Objective-C, Java. FP support seems to be whatever is in C/UNIX (or Java). /enddocument