I received the following message from FileMaker Developer Relations:
Please note, after downloading and applying the FileMaker Pro 12.0v4 or FileMaker Pro 12.0v4 Advanced update on Mac OS X, you must re-start your machine before using the software.
FileMaker Developer Relations
It does not appear to be literally true - I launched FileMaker without restarting and it appeared to work fine.
So what is really happening here?
If you launch 12.0v4 without restarting is there really a problem?
If you have launched 12.0v4 without restarting, and then go ahead and restart, does that solve the problem?