What happens to my OS 9 Authorization Keys after Installing OS X?
Installing or upgrading OS X on your Macintosh may erase any currently installed OS 9 key disk authorizations (such as ReverbOne for Pro Tools 5.1.1). Uninstall all key disk authorizations before installing or upgrading OS X. After installing OS X, or upgrading your OS X version, run the following from the OS X Disk Utilities: “Repair Disk Permissions”
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