-Dignore.javadocjdk ignores jdk9 requirement (which is not an issue if not building javadoc)
diff --git a/pom.xml b/pom.xml
index fbf9dd9..9c758c7 100644
--- a/pom.xml
+++ b/pom.xml
@@ -160,6 +160,9 @@
                 <os>
                     <family>mac</family>
                 </os>
+                <property>
+                    <name>!ignore.javadocjdk</name>
+                </property>
             </activation>
             <build>
                 <plugins>