
The new Retina iMac, also known as the iMac with 5K Retina display, came at a time when the iMac line needed an infusion of something new, something dramatic -- after all, it's difficult to get really excited about another speed bump. The last time Apple made a major change in the iMac was in late 2012, and that was when Apple shrank the iMac to 5mm at the edge, a change that was nice, but a thinner iMac wasn't on most people's wish list.
The Retina iMac is the change in the iMac lineup we've all been waiting for, but it's not quite the computer for everyone -- yet. This buyer's guide, and the video below, take a look at what needs to be considered when deciding to buy the Retina iMac.
The Retina iMac looks like your typical iMac from the outside. The key difference is the screen; you'll notice that it shows amazing detail, and images look crisper and cleaner on the Retina iMac than on a standard iMac.
Apple calls a display "Retina" when a user, at a typical usage distance, can't discern the individual pixels on the screen. The Retina iMac achieves this with a 5120-by-2880 pixel resolution. A standard 27-inch iMac has a resolution of 2560-by-1440. That's a lot more pixels (four times, to be exact) on the Retina iMac.

Screen resolutions compared with the Retina iMac
If you're still trying to wrap your head around the enormity of the Retina iMac's resolution, Apple provides a sample 5K image that you can look at on your Mac. The Retina iMac can show this complete image on its display.Click here to read more...
Article Link: iMac Buyer's Guide: Is the 5K iMac Right For You?