If your on Maverics you should be Ok not upgrading for a while. I used one of those adapter with snow leopard on a mac book up to this spring (upgrading compatability being questionable). It finally became clear that enough software needed a new OS that I got a newer machine.
Mavericks beachballs on a way faster machine more often than it ever did on snow leopard. I miss that os.
Mavericks beachballs on a way faster machine more often than it ever did on snow leopard. I miss that os.