Installing Adobe CS5 Master Collection on an Imac running OS 12.1

I'm trying to install Adobe CS5 Master Collection on an Imac running OS 12.1. Some posts I've seen say this can be done (I have original disks & serial number). However when I click Install a window states :

""Install" needs to be updated."

"The developer of this app needs to update it to work with this version of macOS. Contact the developer for more information."

Any suggestions as to what that means and how to proceed?