Learn more about Crucial DDR4 SO-DIMMDetailsCompatibilityFor Apple iMacCapacity32GB (2 x 16GB)SpeedDDR4 2666 (PC4 21300)CAS Mac system performanceCompatible with the Apple iMac Retina 5K, 27-inch, 2019 Intel Core i5, 3.0 GHz & 3.4 GHz models Every single module extensively tested at the component and module levelEasy to installShippingEnjoy fast and reliable shipping when you buy your products from Newegg. Our ordering and shipping services are among the best in the industry due to short processing times and a variety of shipping methods. Your orders are packaged at one of the many local warehouses across the country, minimizing delivery times and ensuring you get your purchases as soon as possible.PaymentsNewegg has partnered with PayPal to offer you the very best in payment services. PayPal allows you to buy with confidence, knowing your payments are processed quickly and securely with state-of-the-art encryption technology.ReturnReturns are subject to restocking fees of 15% - 30% of the purchase price and return shipping fees. For products that are eligible for return for replacement, the return shipping labels are free for returns for replacement of the same item within the applicable return policy period. Newegg does NOT charge for restocking fees or return shipping labels for returns of defective products, or if you received the wrong product, the product did not match what was shown on the Site, or we made some other shipping error, provided the item is returned within its return policy period, and in accordance with the Return Policy. For international buyers, items shipped internationally do not qualify for manufacturer warranties.