Cubase 6.5 in MAC OSX EL CAPITAN

Been running Cubase all the time I’ve been recording music(a couple of years). Decided to upgrade my OS to El Capitan. Cubase stops working. Tries to work around the problem, won’t work. So I uninstalls Cubase and try to reinstall it to see if it works. Apparently not! Cubase 6.5 will not install on MAC OS 10.11 El Capitan.

So for me to continue the work I’ve done in Cubase, I have to upgrade to 8.x and spend alot of money because my version of Cubase is no longer compatible with my OS, am I correct?

Best regards/