Hi Matt, Not much luck with iXAFS3.0 so far. Under 10.5.8 (two macbooks), iXAFS crashes at startup. Under 10.6.4 (macbook pro), IXAFS opens, but clicking on athena/Artemis/Hephaestus only opens an X11 terminal. I think that somehow the installer expects perl to live in /Users/Newville/: $ pwd /Applications/iXAFS.app/Contents/Resources/local/bin b$ artemis -bash: /Applications/iXAFS.app/Contents/Resources/local/bin/artemis: /Users/Newville/Codes/ifeffit/local//bin/perl: bad interpreter: No such file or directory $ I also tried to install python, but something must be wrong with setup.py since files are copied to /Users/Newville. I now have such an inhabitant on my HD thanks to sudo, but even then the install failed. See details below. Hope it’s nothing traumatic! Thanks, JOEL JoelMacBook-Silver:IfeffitPython-2.0.0 joelb$ python setup.py install running install running build running build_py creating build creating build/lib creating build/lib/Ifeffit copying lib/__init__.py -> build/lib/Ifeffit copying lib/Ifeffit.py -> build/lib/Ifeffit copying lib/ifeffit_config.py -> build/lib/Ifeffit copying lib/shell.py -> build/lib/Ifeffit running install_lib creating /Library/Python/2.6/site-packages/Ifeffit copying build/lib/Ifeffit/__init__.py -> /Library/Python/2.6/site-packages/Ifeffit copying build/lib/Ifeffit/Ifeffit.py -> /Library/Python/2.6/site-packages/Ifeffit copying build/lib/Ifeffit/ifeffit_config.py -> /Library/Python/2.6/site-packages/Ifeffit copying build/lib/Ifeffit/shell.py -> /Library/Python/2.6/site-packages/Ifeffit byte-compiling /Library/Python/2.6/site-packages/Ifeffit/__init__.py to __init__.pyc byte-compiling /Library/Python/2.6/site-packages/Ifeffit/Ifeffit.py to Ifeffit.pyc byte-compiling /Library/Python/2.6/site-packages/Ifeffit/ifeffit_config.py to ifeffit_config.pyc byte-compiling /Library/Python/2.6/site-packages/Ifeffit/shell.py to shell.pyc running install_data creating /Users/Newville error: could not create '/Users/Newville': Permission denied Running as SUDO: JoelMacBook-Silver:IfeffitPython-2.0.0 joelb$ sudo python setup.py install Password: running install running build running build_py running install_lib running install_data creating /Users/Newville creating /Users/Newville/Codes creating /Users/Newville/Codes/ifeffit creating /Users/Newville/Codes/ifeffit/local creating /Users/Newville/Codes/ifeffit/local/bin error: can't copy 'ifeffit_shell.py': doesn't exist or not a regular file