JAVAxx env vars need to be declared on mac slaves:
https://dev-platform-jenkins.rhev-ci-vms.eng.rdu2.redhat.com/label/mac/

For win and linux, it's set up here:
https://gitlab.mw.lab.eng.bos.redhat.com/dev-platform/mwqa-cloud-slaves/blob/master/label/windows/mwqa_drives_tools.ps1
https://gitlab.mw.lab.eng.bos.redhat.com/dev-platform/mwqa-cloud-slaves/blob/master/label/linux/mwqa_drives_tools.sh

On mac slaves, we just need to add these to .bash_profile . Or maybe more than that because .bash_profile may not get called when jenkins slave starts.