I have an old MacBook Pro (mid-2010) and I am currently running Mountain Lion. Due to lack of any type of support (I cannot install most new versions of applications), I think about installing a newer version, but I don't want the most recent as it will slow my computer down too much. Ideally I would like to upgrade to Mavericks.
I saw a similar topic, which unfortunately doesn't answer my question (as I have never installed my desired version with my Apple ID):
Is there any way I can do this?