So, you have a STIG'ed box, and McAfee av won't install. The problem is the umask of 077. The installer id supposed to temporarily set the umask to 022 the /opt/NAI directory, but due to the stigging, it won't let it. Temp fix. Add to the first lines of the Mcafee-installer script.
Mkdir /opt/NAI
Chmod 755 /opt/NAI
That will allow for install. At the bottom of the installer add nails:nailsgroup to an group with elevated permissions.
Hope this helps.
