On Thu, Feb 25, 2010 at 8:33 AM, Massimo Di Stefano <massimodisasha at yahoo.it> wrote: > Hi You need the 64bit version of Qt (cocoa) This assumes a 64-bit python-3 installation. How was python installed? My understanding is that the universal Mac binaries provided at python.org do not include support for x86_64. Darren