Final Draft v.7 is not supported on Mac OS X 10.8 (Mountain Lion) or 10.7 (Lion), it's too old. If you need to run Final Draft on a computer with one of these operating systems, you will want to upgrade to v.8, which was designed for 10.8 / 10.7.
If you're on OS X 10.6.8 or older:
This issue can usually be resolved by repairing permissions.
Final Draft should now launch without any problems.
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