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Question When I launch Master X3 for Pro Tools HD under Mac OS X, I get the following error message: This version of TC MASTER X3 requires authorization again in order for you to continue using it. Please press the "Authorize" button to begin the reauthorization process. If I press "Authorise" a window comes up with the following error: Operating System ErrorAn I/O error happened.ID eOS : -36 / :329 My Master X3 is already authorised on my iLok - why do I need to re-authorise it

Answer
This error is related to the iLok authorisation, and can occur if you have external harddrives are mounted in Mac OS X when you run the Installer. Please un-mount the drives in question, and re-run the installer for Master X3, then it should work fine. The latest Master X3 installer can be downloaded from this page.