I don't have any experience with MAC's, but from the mcafee agent 5.0.2 guide:
Enable SSH on the Linux and Macintosh client systems before installing McAfee Agent from McAfee ePO.
Comment out the following line in the /etc/sudoers file on a Red Hat operating system.
Remove the comment from the following line /etc/ssh/sshd_config file
You must have root permissions to install McAfee Agent on non-Windows system.