Get 2017 iMac 4K at B&H Photo.
MPG strongly recommends the iMac 5K, but sometimes space constraints make the iMac 4K a sensible choice. Note that the iMac 5K memory is trivially upgradeable via a rear memory hatch that provides access to the 4 slots. By comparison, the iMac 4K requires separating the entire back from the screen in order to get to the internals—best to have it done for you professionally (OWC/MacSales.com can do this).
MACSALES.COM OFFERS MEMORY UPGRADES UP TO 32GB FOR NEW APPLE IMAC WITH 21.5” RETINA 4K DISPLAY — Savings Up to 46% vs. Factory
Woodstock, IL, June 16, 2017 – MacSales.com, a leading zero emissions Mac and PC technology company, announced today the availability of new OWC Memory Upgrade Kits, with up to 32GB of memory for the 2017 Apple iMac 21.5” with Retina 4K display introduced last week at the Apple Worldwide Developers Conference (WWDC) in San Jose.
OWC 2400Mhz DDR4 memory, compatible with the new iMac, is available now for immediate shipment to customers. Upgrading Memory in iMac boosts performance and helps the new iMac deliver visual effects and 3D graphics, allowing the editing of multicam projects in Final Cut Pro X, with up to five streams of 4K video. For over 20 years, MacSales.com has provided the memory upgrades that allow the iMac (and all other Mac laptops and desktops) to operate at maximum potential, delivering faster video editing, faster gaming and faster 3D graphics.