I have updated the portfiles to support installation on Mac OS X via MacPorts. This brings support to

RTT v1.10.2 (with associated patch file)
KDL v1.0.1 (now with Python 2.5 support)
BFL v0.7.0
OCL v1.10.1

See the instructions on the wiki page

http://www.orocos.org/wiki/rtt/installation/installing-macports-mac-os-x

I will be submitting these to MacPorts as official ports, though I hear that it can take quite some time to get a new port into the system ...

Please let me know if you have any issues.
Stephen