WebPopupWindow Display problem on MAC,How can I make my UI look like Windows on the MAC

[xcfdszzr]

  <style type="rootpane" id="common-message-window">
    <painter>
        <decorations overwrite="true">
            <decoration>
                <WebShape round="5" />
                <WebShadow color="0,0,0" type="outer" opacity="0.5" width="30"/>
            </decoration>
        </decorations>
    </painter>
    <style type="panel" id="content" extends="transparent" />
</style>

On the MAC, the display is not transparent and has a background color. But it works on Windows

this is mac

this is windows

How can I make my UI look like Windows on the MAC

[mgarin]

This looks like an issue with specific Java/OS version.
Which Java & OS versions are you using while running the app in the first screenshot (on Mac)?

[xcfdszzr]

This looks like an issue with specific Java/OS version. Which Java & OS versions are you using while running the app in the first screenshot (on Mac)?

I used Java JDK 1.8 ,macOS Big Sur 11.6