iMac 21.5-inch 4K (2017) iMac 27-inch 5K (2015) - Technical Specifications: Display 21.5-inch (diagonal) 4K Display Processor 3.6GHz Quad-Core Intel Core i7 processor Memory 16GB memory Storage 512GB SSD OS macOS Sonoma P/N RFB00632- $1,099 Email us