P9p file(1) fails to recognise 64-bit Mach-O binaries (thus breaking things like src(1) and friends). I don't know if it ever worked right.
: iridium:aram; uname -a Darwin iridium 12.4.0 Darwin Kernel Version 12.4.0: Wed May 1 17:57:12 PDT 2013; root:xnu-2050.24.15~1/RELEASE_X86_64 x86_64 : iridium:aram; : iridium:aram; gcc -v Using built-in specs. Target: i686-apple-darwin11 Configured with: /private/var/tmp/llvmgcc42/llvmgcc42-2336.11~182/src/configure --disable-checking --enable-werror --prefix=/Applications/Xcode.app/Contents/Developer/usr/llvm-gcc-4.2 --mandir=/share/man --enable-languages=c,objc,c++,obj-c++ --program-prefix=llvm- --program-transform-name=/^[cg][^.-]*$/s/$/-4.2/ --with-slibdir=/usr/lib --build=i686-apple-darwin11 --enable-llvm=/private/var/tmp/llvmgcc42/llvmgcc42-2336.11~182/dst-llvmCore/Developer/usr/local --program-prefix=i686-apple-darwin11- --host=x86_64-apple-darwin11 --target=i686-apple-darwin11 --with-gxx-include-dir=/usr/include/c++/4.2.1 Thread model: posix gcc version 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2336.11.00) : iridium:aram; : iridium:aram; which sam /Users/aram/plan9/bin/sam : iridium:aram; : iridium:aram; 9 file /Users/aram/plan9/bin/sam /Users/aram/plan9/bin/sam: as program : iridium:aram; file /Users/aram/plan9/bin/sam /Users/aram/plan9/bin/sam: Mach-O 64-bit executable x86_64 : iridium:aram; -- Aram Hăvărneanu