If you can't get this thing to install (e.g. it says that it can't find an existing version to upgrade, but you do actually have one installed), just use Pacifist (available here at MacUpdate) to extract all the bits and pieces and put them in the right places. Hints: To install to /usr/bin and /usr/share (the unixy bits), use Terminal to go to /usr/bin and do "open .", and do the same in /share, to open those usually hidden folders in the Finder, so you can drag-drop from Pacifist into them. Be sure not to overwrite entire folders; i.e. do not drag-drop /usr/share, but open /usr/share/man/man1 and drag-drop the appropriate FILE into that folder; same goes for the stuff intended for /Library and /System, etc. Put the files EXACTLY where Pacifist says they should go (e.g. the app must be in /Applications not /Applications/Utilities or ~/Applications). The only downside is that Pacifist runs a prebinding update after every single drag-drop operation (even for, say, documentation files, which have no prebinding). So it takes quite a while. Lastly, because I trust Apple's installer to get the permissions right more than I trust Pacificist, after doing all of this, I re-run the .pkg installer, which now has an "Upgrade" option, that actually works (it just reinstalls everything I just manually installed, but does it the Apple-preferred way.) PS: Pacifist is a little buggy - sometimes it can take two drag-drop operations to actually get it to do anything. You'll see it working when it happens correctly. Hope this helps folks.