Just FYI.
the answer to this issue was plain and simple.
I didn't have the proper "rights" on the MAC when my user preferences were set up. Now I do...so install worked.
Had nothing to do with any renamed Archicad folder hierachy or anything like that.....just so's you all know in case you run into this type of message.
...Bobby Hollywood live from...
i>u
Edgewater, FL!
SOFTWARE VERSION:
Archicad 22, Archicad 23
Windows7 -OS, MAC Maverick OS