Hi, I'm trying to create an application for the Mac that is compatible with OSX 10.6 through 10.8, with both 32 and 64-bit support. How do I configure my Boost 1.50.0 to generate the appropriate binaries (I use serialisation, System and FileSystem), please? Best wishes. Tim Burgess Raised Bar Ltd. Tel: +44 (0)1827 719822 Web: http://www.raisedbar.net We can supply Roland and Avid products with specialist pre and post-sales support for visually-impaired users - just drop us a line for a quote. Don't forget to sign our on-line petition to lobby for improved access to music education and music technology at: http://www.raisedbar.net/petition.htm