Comment 9 for bug 415900

Preliminary fontcache reset

1) Quit any running instances of Inkscape and X11
2a) clear the X11 font cache: 'rm ~/fontconfig/*'
2b) if '~/.fontconfig/' doesn't exist, create it: 'mkdir ~/.fontconfig'

A) using OS X tools

 3) open 'Applications > Utilities > Console', select 'All messages'
    from the Log List
 4) use 'Clear Display' to get an empty window
 5) start Inkscape by double-clicking the *application* icon in the finder
 6) watch the console window, copy&paste the console messages into TextEdit
    and attach the file to this bug report, as well as any crash reports
    (use the Log List to find the most recent) from inkscape and X11/Xquartz.

B) using shell / Terminal.app:

If you want to use the terminal to catch the console messages, you need to call the launcher script with its full path (as described in bug #435812 and bug #181639): assuming you installed 'Inkscape.app' into '/Applications', type:

 3) '/Applications/Inkscape.app/Contents/Resources/script'
 4) save the console output into a file and attach it to this bug report
 5) attach any recent crash reports for 'inkscape-bin' or X11 you can find
    in '~/Library/Logs/CrashReporter'

> can it be that the application interferes with some macports thing
> i installed?
It is possible, but the known issues that had prevented earlier versions of Inkscape 0.47pre from launching have been fixed in the latest prerelease builds.