Cannot reinstall Cubase Artist 7.0 in El Capitan

Hi -
I had to reinstall Cubase 7 Artist (box says 2013). It would not reinstall from CD, after I downloaded the installer packages from the Cubase/Steinberg webpage ( Cubase_7.0.2_Complete_Installer_for_macosx and Cubase_7.0.7_Update_mac) I get the following error message:

“You need at least Mac OS X 10.6.0 to install this software”.
OS X on my MAC is El Capitan 10.11.4, thus generations newer than 10.6.0. Does Cubase not recognize the newest OS ?

I appreciate any advice.