The page root.cern.ch/drupal/content/inst … oot-source is valid for all platform. [quote]Then what should I do with LD_LIBRARY_PATH ?[/quote]humm this is exactly what step 3 talks about. The update of PATH and LD_LIBRARY_PATH can either be done by hand (not described in the documentation) or automatically via the source of bin/thisroot.sh or bin/thisroot.csh
[quote]Actually I don’t really understand this:…Could you explain that with a few more words ?[/quote]The paragraph you are quoting says that the ‘Location independent installation’ is a better match for MacOS than the ‘Fixed location installation’ described in the next few paragraphs.