I've got a an 24" iMac mid-2007 which had it's HD replaced with an SSD. Apart from the HD failing earlier this year, it's amazingly reliable. And with the SSD, it's pretty fast for the non-intensive stuff. Basically, it's a browsing machine, but it can still handle lots of other stuff. I'm not doing 3D or video, or anything. And it runs 10.11 El Capitan perfectly, better than 10.10 Mavericks. (I think it's the oldest machine to be able to run El Cap) 8 years is amazing as as a lifespan for a modern computer, and I think it has at least 5 more years in it. It's really solid. In contrast, my 13" MacBook Air mid-2011 overheats all the time and spontaneously restarts (to be fair, my girlfriend watching flash content doesn't help) So what is the most reliable Mac in the current range? That will last 10 years? I'm a bit wary of the newer iMacs because of their laptop components, and I'm even more way of the laptops because of my experience with my MacBook Air.