(Retina 5K iMac - Front & Side)īoth the standard iMac "Core i5" 3.5 27-Inch and the custom processor iMac "Core i7" 4.0 27-Inch are equipped with a Quad Core "Haswell" processor, but the processors differ accordingly: iMac (Late 2014)Īt the time of purchase, the Core i7 (4790K) processor option added US$250 to the cost of the standard Retina 5K iMac. There are much more substantial differences between the "Late 2014/Mid-2015" Retina 5K iMac and the previously introduced "Late 2013" iMac line. There are modest differences between the processor options for the "Late 2014" Retina 5K iMac models as well as minor differences between the "Late 2014" Retina 5K iMac models and their lower-end "Mid-2015" Retina 5K contemporary. Both lines were replaced by the "Late 2015" models on October 13, 2015. On May 19, 2015, Apple added a cheaper "Mid-2015" Retina 5K variant - the iMac "Core i5" 3.3 27-Inch. However, because it can be uniquely identified, also documents the custom processor option for the standard model independently as the iMac "Core i7" 4.0 27-Inch. There is only one stock "Late 2014" Retina 5K iMac model - the iMac "Core i5" 3.5 27-Inch.
![imac 27 late 2013 model imac 27 late 2013 model](https://media.itpro.co.uk/image/upload/t_content-image-desktop@1/v1570813961/itpro/screen.jpg)
However, this Q&A has been updated subsequently and can be quite helpful to anyone buying or selling one of these systems on the used market. Please note that the "Late 2014" and "Mid-2015" iMac models have been discontinued.
![imac 27 late 2013 model imac 27 late 2013 model](http://i.ytimg.com/vi/cfIs9IcKSeQ/maxresdefault.jpg)
What are all the differences between the "Late 2014/Mid-2015" Retina 5K Aluminum iMac models? What are all the differences between these models and the 27-Inch "Late 2013" iMac models? Which should I buy?