Cubase LE 6 on Mac OS X 10.10

I have a Cubase LE 6, licenced from a hardware I bought, a Zoom H4N.

I used it some times on the Mac.
I had to update the Mac OS X to 10.10, reinstalling everything.
When I try to install Cubase LE6, the installer say “wrong version of Mac OS X, you need at list 10.5”.
On Steinberg site, I got only an update, but it doesn’t work if I don’t have already installed an old version.

How do I install Cubase Le6?
I really need it for making short music jingles at my work.
cubase error.tiff (73.4 KB)

Hi nad welcome,

Use tuhé Steinberg Application Installer Tool for Mac OS X 10.10 (Yosemite) and 10.11 (El Capitan), please.