I’ve just downloaded and installed the latest OS X for my Macbook Pro (vintage 2011). Having exhausted the “Big Cats” naming convention, Apple continued with the “Great Places In California” theme with El Capitan. I was a little dubious: Yosemite had made my machine buggy, insanely slow, and prone to crashing. I was a little apprehensive installing El Capitan but I thought “How could it get any worse?”*
Surprise! I can’t say about the crashing, but the uploaded El Capitan is noticeably faster than Yosemite, meaning that instead of running like a glacier the machine runs like an inebriated tortoise.
*Yes, I know. It can always get worse, regardless of what “it” is.