Apple weds high-res 4K visuals into its sleek, 5mm thin, mid 2017 21.5" iMac with Retina 4K Display. With a 4096 x 2304 screen resolution, this iMac provides 1 billion colors and 500 nits of brightness, which is 43% brighter than the previous model.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzes reviews to verify trustworthiness.