Problem install Cubase 6 to my MacBook pro

Hi,

I have problem reinstall my Cubase 6 to my MacBook Pro. My MacBook was crashed recently & was fixed by Apple & they had installed OS X Yosemite Version10.10.5 to my laptop. When I reinstalled my Cubase 6 to my MacBook it failed & showed that it can be installed only to version OS X 10.5.0. Can anyone help me with this?

Angelina