OS X 10.9 Mavericks and Cubase 7

Sorry for a possibly dumb question, but does this imply that using a “working” (e.g. not fully supported) version of Cubase under Mavericks with NO class-compliant audio hardware connected (e.g. the Mac’s own internal audio interface) should be safe?

I’m using an antediluvian CB Studio 5.5 which is doing just fine right now, but obviously I don feel confident enough to just let it run.

Thanks in advance.