FULL PRODUCT VERSION :
java version "9-ea"
Java(TM) SE Runtime Environment (build 9-ea+151)
Java HotSpot(TM) 64-Bit Server VM (build 9-ea+151, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
macOS Sierra 10.12.2

A DESCRIPTION OF THE PROBLEM :
Text layout for AAT fonts on macOS ignores fractional metrics hint - result of layout always has floating-point advances, as if fractional metrics were enabled.

REGRESSION. Last worked in version 8u112

ADDITIONAL REGRESSION INFORMATION:
java version "1.8.0_112"
Java(TM) SE Runtime Environment (build 1.8.0_112-b16)
Java HotSpot(TM) 64-Bit Server VM (build 25.112-b16, mixed mode)

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Run a sample program given below.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
The first and the third line of output contain integer values.
ACTUAL -
Third line contains floating-point value.

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.awt.*;
import java.awt.font.*;

public class FontLayoutTest {
    public static void main(String[] args) {
        Font ttFont = new Font("Arial", Font.PLAIN, 12);
        Font aatFont = new Font("Menlo", Font.PLAIN, 12);
        String text = "a";
        FontRenderContext noFmFrc = new FontRenderContext(null, true, false);
        FontRenderContext fmFrc = new FontRenderContext(null, true, true);
        System.out.println(new TextLayout(text, ttFont, noFmFrc).getAdvance());
        System.out.println(new TextLayout(text, ttFont, fmFrc).getAdvance());
        System.out.println(new TextLayout(text, aatFont, noFmFrc).getAdvance());
        System.out.println(new TextLayout(text, aatFont, fmFrc).getAdvance());
    }
}

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