I'm failing to install NXT-G on Mac 10.6.x. Whatever I try seems to end up with an error saying "A required file is broken" when I try to run the IDE. Could someone talk me through the steps please?
The drivers are probably not installed correctly. You have to run the legodriver.pkg (by double-clicking on it) which you can find in the 'Parts' folder.
You should use this detailed list of steps (and references). The legodriver.pkg is mentioned on point 5 of the fix for OS 10.6.