macOS 10.13 High Sierra has been out for some time and many of us have it installed on our personal laptops. We should upgrade a few mac slaves in our jenkins to it:
https://dev-platform-jenkins.rhev-ci-vms.eng.rdu2.redhat.com
JBDS QA Lab: https://mojo.redhat.com/docs/DOC-67643
New Jenkins slave configuration https://mojo.redhat.com/docs/DOC-150239