Nothing more be said. The Dialog Title is only wishful thinking in FileMaker 15 when using the Get Directory script step.
Thank you for your post.
Development and Testing are aware of this change in Mac OS X 10.11.x and subsequent macOS Sierra 10.12.x. The issue does not occur under Mac OS X 10.10.x and earlier, as well as not occurring under Windows. We have been working with Apple to find a resolution. This issue has been documented in Knowledge Base Article #16003:
Custom title for system dialogs do not display as expected when using FileMaker Pro on OS X El Capitan (OS X 10.11) | Fi…
I have attached your post to the original report. When more information becomes available, I will let you know.
Retrieving data ...