ADDITIONAL SYSTEM INFORMATION :
JDK 11-ea and JDK 12-ea
   java 11-ea 2018-09-25
   Java(TM) SE Runtime Environment 18.9 (build 11-ea+26)
   Java HotSpot(TM) 64-Bit Server VM 18.9 (build 11-ea+26, mixed mode)

ProductName: Mac OS X, ProductVersion: 10.13.6 and newer


A DESCRIPTION OF THE PROBLEM :
The Oracle JDK installation for JDK 11-ea on macOS (OS X) does include files of JavaFX i.e. .../Home/lib/javafx.properties.
The command "java --list-modules" does not list javafx modules.
This is not true for Windows or Linux installation.
And this is NOT true for the "OpenJDK builds" installation on macOS.

REGRESSION : Last worked in version 11

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
On macOS intall the JDK-11 from Oracle JDK builds. (http://jdk.java.net/11/)


EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
there should be no files for JavaFX in the JDK installation.
ACTUAL -
JavaFX file are still present:
.../lib/javafx.properties, .../lib/javafx-swt.jar, .../lib/libjfxwebkit.dylib etc.

FREQUENCY : always