I haven't recently updated the OS (which is still a version of X)
So it is either Mac OS X 10.4 Tiger
, Mac OS X 10.5 Leopard
or Mac OS X 10.6 Snow Leopard
Mac OS X 10.7 Lion
and OS X 10.8 Mountain Lion
are still a version of X, just that OS X 10.8 Mountain Lion
shed the "Mac" from its name in order to be more in line with "iOS".
To find out what Mac OS X version you run:
and I have a flash build that's fairly recent (not v11, but the most advanced 10 build).
Then maybe it is time to update, as many sites abandon older versions of Flash for their content.