In particular, using adhesive to attach the display to the chassis -- rather than magnets like previous Aluminum iMac models -- is a design decision that is inelegant at best. If you need info please ask. How much RAM does each model actually support?For all of the "Late 2012", "Early 2013", "Late 2013", and "Late 2014" 21.5-Inch and 27-Inch "Tapered Edge" iMac models, Apple formally notes that the systems have "two 4 GB" of "1600 MHz DDR3 memory." However, for the 27-Inch models, Apple adds that these systems have "four user-accessible SO-DIMM slots."Most interested in a 21.5-Inch model likely should instead consider upgrading the RAM on an applicable model at the time of purchase -- which unfortunately means paying a higher upfront price overall -- or alternately hiring a professional to perform the upgrade on models that can be upgraded.After watching these videos, it should be clear that upgrading the RAM in applicable 21.5-Inch iMacs is a pain whereas it is a simple procedure for the 27-Inch iMacs.
99. After installing RAM, iMacs from before 2017 might make a warning sound when you first start them up. Please select the products to be compared from same category.250GB 2.5-inch internal SSD • SATA 6.0Gb/s • 560 MB/s Read, 510 MB/s Write1TB 2.5-inch internal SSD • SATA 6.0Gb/s • 540 MB/s Read, 500 MB/s WriteThe maximum number of products that can be compared is 4. ** Officially, the 27-Inch "Late 2015" models support 32 GB of RAM, but they actually can support 64 GB.To locate the model identifier in software, select "About This Mac" under the Apple Menu on your computer, click the "More Info..." button, and finally click the "System Report" button.For your convenience, these details are summarized accordingly:RAM Types & Actual Maximum RAM CapacitiesIf it is important to you to be able to upgrade the RAM yourself, particularly as higher capacity memory modules may become available in the future, you may instead prefer to avoid these 21.5-Inch iMac models altogether in favor of a 27-Inch "Late 2012", "Late 2013", "Late 2014", "Late 2015", "Mid-2017" or "2019" model.The EMC number is inconveniently located on the bottom of the "foot" supporting the iMac, but EveryMac.com nevertheless has hand documented the EMC numbers as they are a unique external identifier.The relevant identifiers for these iMac models follow:iMac RAM Purchase & Professional Installation Options iMac (27-inch, Late 2013) 32GB: PC3-12800 (1600) DDR3 204-pin SO-DIMM: … Holding the sides, lay the computer slowly face down on the towel.The button to open the RAM door is in the circular indent where the power cable goes.Even if you aren't buying a new iMac, upgrading the RAM on your old computer is a quick and affordable way to give your computer more multitasking juice to handle all of those open tabs in your Chrome browser.