[Mac OS X] cannot install Cubase 6.5 on Yosemite

Hi

I am trying to install Cubase 6.5 on Yosemite (10.10.2) using ‘Steinberg Application Installer Tool For Yosemite’, and I keep getting this message: “No Steinberg products found. Please mount the downloaded product or insert the product disc in your disc drive and restart this app.”

The 6.5 version I am trying to install, is the full version available on the Sternberg download page.

It works great on every other version of Cubase that I have tried to install.

What to do?

I have updated to Yosemite 10.10.3 and still have the same issue.

Anyone?