FileMaker Pro 15.0.3 Update
You can read in the knowledge base about FileMaker Server 15.0.3 (6 fixes),
FileMaker Pro (Advanced) 15.0.3 (6 fixes) and FileMaker Go 15.0.3
As usual FileMaker provides updaters only for Windows and we miss the ones for Mac. So here are the links for Mac:
FileMaker Advanced 15.0.2 to 15.0.3:
https://productupdates.filemaker.com/pro/15.0.2/release/fmpa.15.0.3.305.updates.pkg.zip
FileMaker Pro 15.0.2 to 15.0.3:
https://productupdates.filemaker.com/pro/15.0.2/release/fmp.15.0.3.305.updates.pkg.zip
Be sure to only apply them when you have the right 15.0.2 version before and FileMaker is not running.