See this article for information on Final Draft compatibility on various Mac operating systems: Which version of Final Draft can I run on which operating system?
For information on upgrading to Final Draft 13, click HERE.
NOTE: Activation service for Final Draft 9 has been discontinued and this version of Final Draft is no longer activatable (or re-activatable) to run in full mode on any computer. The program will continue to work but only on a computer that is already activated and only if nothing is done to the computer that will deactivate it (such as an OS upgrade or a replacement hard drive).
Technical support (phone, chat and email) for Final Draft 9 and older is no longer available.
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https://fd.support/3qBPvc3