"If you look at the system requirements for the upcoming OS X El Capitan, for example, you’ll see that it’ll run on computers as old as a mid–2007 iMac. More to

"If you look at the system requirements for the upcoming OS X El Capitan, for example, you’ll see that it’ll run on computers as old as a mid–2007 iMac. More to the point, you’ll notice that those requirements are unchanged from its predecessor, Yosemite". Wrong. I updated my 2007 iMac to Yosemite and it was unusable. Each clicks takes seconds to respond. That is after I added RAM. I replaced it with Mint which works just fine. While hardware is durable, their system requirements are misleading.