Driver install method at the MAC OS

▣     Model : SCX-812x / SCX-82X0 / CLX-9XX1 / CLX-9XX2/ CLX-865X  Series

▣     Symptom:

Driver installation doesn’t progress automatically and pop up notice. "Printer Driver Installer.pkg" can't be opened because it is from an unidentified developer.
        

▣     Root Cause

Compatibility issue between MAC OS ver.10.10 and installer

▣     How to handle

Install the Driver after change the security setting

Follow below process