Installing Mercurial on Snow Leopard
I had trouble getting mercurial 1.3.1 to install (using easy_install) in Snow Leopard today. First I had to re-install Xcode and include the 10.4u SDK, as it was looking for that and it wasn't there.
Even after installing that SDK, it failed to install. Complaining it couldn't find stdarg.h. After some googling of the error messages, I found a workaround:
easy_install -U mercurial
Note that I'm using the Python 2.6.2 build from python.org, which is 32-bit, not the 64-bit Python 2.6.1 that is included with Snow Leopard.