built a libusb-1.0.8 package installer for os x. it’s a universal binary for both i386 and x86_64 archs (“32 and 64 bit”).
it was built on a snow leopard (10.6) x86_64 machine; haven’t been able to try it on any other version/arch. used the default minimum target setting in packagemaker which was leopard (10.5) and compiled both a i386 and a x86_64 lib and lipo’d them together.
anyone with a i386 machine and/or other versions of os x are very welcome to report success/fail.
update: tested and working on i386 snow leopard.
update2: tested and working in os x 10.7 (Lion), thank you F-red!