Have updated, cleared caches, restarted

Have updated, cleared caches, restarted Safari, Opera, Chrome, Firefox and still I cannot play a game on Facebook or watch a movie.  It keeps telling me I need to upgrade.  This is major crap.  I have a mid 2012 MacPro, 2 x 2.4 Ghz 6-core Intel Xeon and am running El Capitan 10.11.1