Hi, thanks for the help- I wasn't quite sure what to look for. I did the macports installation but it fails on graph-tool - everything seems to install fine but I searched for libboost_python and it's not on my computer, so I guess the boost_python libraries were actually not installed at all. searching for boost gets me this: sudo port installed boost The following ports are currently installed: boost @1.46.1_0 (active) without the additional specifications. I will try to install boost with +python27 and see if that helps. Thanks again! -Janna -- View this message in context: http://main-discussion-list-for-the-graph-tool-project.982480.n3.nabble.com/... Sent from the Main discussion list for the graph-tool project mailing list archive at Nabble.com.