FirstClass(R) 8.1 Client ReadMe for Mac OS US English (Base) The FirstClass client is copyright 2007 by Open Text Corporation. The FirstClass client is the graphical front-end software required to connect to FirstClass servers. It is designed for use with FirstClass Business or Education Edition version 8.1 and has all the trusted communication and collaboration functions of previous FirstClass client products. A. Installation 1  Download the attached FC8102US.Hqx into a temporary folder. 2  Double-click the file and follow the on screen instructions to complete the installation.