I've been happy to run my early 2009 Mac Mini on OS X 10.8, Mountain Lion because later versions have not bought any significant benefits from my point of view. Now the wired Apple keyboard I have enjoyed using for the past seven years has packed a sad. I have looked around locally for another. They were available until recently, but not now….. Currently using the older, plastic Apple keyboard, which I got in 2005, but never did like So, I'm thinking of getting a Magic Keyboard introduced last year, which seems OK to me. However, that would mean doing the upgrade to El Capitan. Are there any downsides to upgrading an older Mac Mini to OS X 10.11?