Just finished. Took several hours. (I ran brew install openssl pyqt) And guess what?
This happens:
$ python bitmessagemain.py
Loading existing config files from /Users/*my username*/Library/Application support/PyBitmessage/
Adding 66.108.210.240 to knownNodes based on DNS boostrap method
Adding 66.108.210.240 to knownNodes based on DNS boostrap method
Adding 82.72.109.211 to knownNodes based on DNS boostrap method
Adding 82.72.109.211 to knownNodes based on DNS boostrap method
Adding 162.13.42.201 to knownNodes based on DNS boostrap method
Adding 162.13.42.201 to knownNodes based on DNS boostrap method
Adding 70.36.177.246 to knownNodes based on DNS boostrap method
Adding 70.36.177.246 to knownNodes based on DNS boostrap method
reloading keys from keys.dat file
reloading subscriptions...
Database file already exists.
Listening for incoming connections.
PyBitmessage requires PyQt unless you want to run it as a daemon and interact with it using the API. You can download PyQt from http://www.riverbankcomputing.com/software/pyqt/download   or by searching Google for 'PyQt Download'. If you want to run in daemon mode, see https://bitmessage.org/wiki/Daemon
Error message: the sip module implements API v10.0 but the PyQt4.QtCore module requires API v9.2

AGGGGHHH. How do I fix this?