ADDITIONAL SYSTEM INFORMATION :
Tested under various versions of Java 8 and Java 10. Specific versions include jdk1.8.0_181 and jdk 10.0.2+13. This report is from a MacBook Pro running macOS Mojave 10.14.4 (the behavior was also verified on other systems running OS-X).

A DESCRIPTION OF THE PROBLEM :
Certain CSS attributes are ignored under OS-X, specifically, attributes "-fx-font-weight: bold;" and "-fx-font-style: italic;" In the test program given below, these attributes work as expected under Windows and Linux.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Create an ordinary label in a GridPane, in an otherwise empty application. Reference a stylesheet. Apply a few styles, to verify that the stylesheet is working. Apply the style attributes "-fx-font-weight: bold;" and "-fx-font-style: italic;" and note that these have no effect.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Text styled with "-fx-font-weight: bold;" should be displayed bold. Text styled with "-fx-font-style: italic;" shoudl be italic.
ACTUAL -
Text does not display in bold or italic, despite the style attributes.

---------- BEGIN SOURCE ----------
public class CssProblem extends Application {
    private int value; // our business data

    Label label1 = new Label("A simple label - normal");
    Label label2 = new Label("A simple label - italic");
    Label label3 = new Label("A simple label - bold");

    public static void main(String[] args) {
        launch();
    }

    @Override
    public void start(Stage stage) throws Exception {
        GridPane root = new GridPane();
        label2.setId("italic");
        label3.setId("bold");
        root.add((label1), 0, 0);
        root.add((label2), 0, 1);
        root.add((label3), 0, 2);

        Scene scene = new Scene(root);
        scene.getStylesheets().add(getClass().getResource("CssProblem.css").toExternalForm());
        stage.setScene(scene);
        stage.setTitle("Bold italic problem");
        stage.show();
    }
}

--- StyleSheet ---

.label {
    -fx-font-size: 24px;
    -fx-text-fill: #008080;
    -fx-border-insets: 5px;
    -fx-border-color: black;
    -fx-border-width: 2px;
    -fx-min-width: 200;
}

#bold {
    -fx-font-weight: bold;
    -fx-text-fill: #80231b;
}

#italic {
    -fx-font-style: italic;
    -fx-text-fill: #148046;
}

---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
No known workaround

FREQUENCY : always