I have
Mathematica 10.0 for Mac OS X x86 (64-bit) (December 4, 2014)
When I click an item on the Demonstrations site, it says
"Iteract Now! Get the free Wolfram CDF Player >>".
So I downloaded and installed the latest CDF Player. Now the (About CDF Player) window says I have
CDF Player version 11.0.1.0 for Mac OS X x86 (32-bit, 64-bit kernel).
Now, if I click on a Demonstration it still says,
"Interact Now! Get the free Wolfram CDF Player >>".
Although I can download a CDF from the demonstrations site, then open it with the CDF Player and it works fine. So how can I make it so CDF Player is used as soon as I click on a demonstration?
EDIT
My computer is a Macbok Pro with Retna display & quad core Intel i7 processor
My browser is Safari version 10.0.1 (10602.2.14.0.7)