[Answer]-Getting 32/64-bit architecture error in Aptana when launching Django project

Take a look at: How do I force Python to be 32-bit on Snow Leopard and other 32-bit/64-bit questions on ways to configure Python to run in 32 bits (VERSIONER_PYTHON_PREFER_32_BIT environment variable seems a good choice).

Or maybe:
Troubles with PyDev and external libraries in OS X