I am on a 6-year-old iMac desktop (2.4 GHz Intel Core 2 Duo) running Mac OS X 10.6.8 and Apple’s app store download page gives me an unhelpful error message hinting that I may need to install software to access the download page without saying what software I might need. Could that be software for upgrading software? Do I need to install some intermediate version of Mac OS X before getting to Mac OS X 10.10 (Yosemite)? Can I / should I just upgrade to Mac OS X 10.9 (Mavericks)? Some apps no longer support Mac OS X 10.6 (Snow Leopard) so I ought to do something.
Recommendations and how to’s very gratefully welcome.