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Installation Directions  https://code.google.com/p/seqtrace/wiki/Installation  Installing and running SeqTrace on a PC is simple, installing it on a Mac requires a few extra steps. more steps than for a PC.  The installation guide offers two options for installing SeqTrace on a Mac, we recommend running SeqTrace with native GTK+ To install SeqTrace on a Mac you will need to download the PyGTK package from OSX.   http://sourceforge.net/projects/macpkg/files/PyGTK/2.24.0/PyGTK.pkg/download