Backward Compatability 2004

Good afternoon. I have discovered 100 or so old .cpr files that I have from my early years of music production. I used Cubase VST 5.1 and then a few versions of SX.

Circa 2004-2006

Is it still possible to open these files with the current ver of Cubase? If not, are the older versions available … and more importantly do they run on OSX.

Not super important of course but it would be neat to revisit some of these projects … Suggestions?