UBB.threads PHP Forum Software Community Forums UBB.classic UBB.classic 6 Support Setting Permissions on Mac

I'm new here, just downloaded UBB 6.0. Appendix C explains how to...4."Set the permission level". How do you set permissions level 775 for "owner" "group""everyone". Read Write Search/Excute??? <img src="https://www.ubbcentral.com/boards/images/graemlins/confused.gif" alt="" />