Apply License Files for Virtuoso Releases 5.x and above, on Mac OS X Note: You must be logged in as a user with Administrator privileges. Locate your new license file in your email or ODS Briefcase, and note its name. (For Virtuoso, this will be virtuoso.lic.) Open a Finder window, and drill down to Macintosh HD -> Library -> Application Support -> openlink -> bin. In this directory, locate any existing file by the same name as your new license file. Generally, this can simply be discarded, but you can keep it if you like; simply move it to a different location (such as your Desktop) or rename it (e.g., virtuoso.lic.2013-03-21.bak). Once the new license is confirmed to work, it's usually best to discard the expired and/or unused license files, to avoid future confusion. Drag your new license file from your email or ODS Briefcase to this directory, replacing any existing file by the same name. Launch Terminal.app (found in /Applications/Utilities/). Execute these three commands (you can just copy-and-paste), and provide your Mac OS X user password when prompted -- cd "/Library/Application Support/openlink/bin" sudo ./oplmgr +stop sudo ./oplmgr +start Start Virtuoso as normal. If license errors are seen in the log file (virtuoso.log, by default), reboot, and test again. If errors persist, please log a Support Case.