then:
        OperatingSystem.current() instanceof OperatingSystem.MacOs

        when:
        System.properties['os.name'] = 'Darwin'

        then:
        OperatingSystem.current() instanceof OperatingSystem.MacOs

        when:
        System.properties['os.name'] = 'osx'

        then:
        OperatingSystem.current() instanceof OperatingSystem.MacOs
    }

        then:
        jvm.toString().contains('dummyFolder')
    }

    def "locates MAC OS JDK9 install when java.home points to an EAP JDK 1.9 installation"() {
        given:
        OperatingSystem macOs = new OperatingSystem.MacOs()
        TestFile software = tmpDir.createDir('software')
        //http://openjdk.java.net/jeps/220
        software.create {
            Contents {
                Home {

Class <org.gradle.internal.os.OperatingSystem$Linux> is not annotated (directly or via its package) with @org.gradle.api.NonNullApi in (OperatingSystem.java:0)
Class <org.gradle.internal.os.OperatingSystem$MacOs> is not annotated (directly or via its package) with @org.gradle.api.NonNullApi in (OperatingSystem.java:0)