ma-yan% file /usr/bin/perl5.12
/usr/bin/perl5.12: Mach-O universal binary with 2 architectures
/usr/bin/perl5.12 (for architecture x86_64): Mach-O 64-bit executable x86_64
/usr/bin/perl5.12 (for architecture i386): Mach-O executable i386
起動時(32|64)ビットを指定
sudo systemsetup -setkernelbootarchitecture (i386|x86_64)
