Operating system: Mac OS Big Sur operating system (released in 2020). Apple iMac: Get a refurbished 27-inch Apple iMac. Display: Features Core i7" 4.2 27-Inch aluminium 5K retina display. Three editions: Choose between a 1TB hard drive, a 265GB solid state drive or a 512GB solid state drive. Keypad: Included an Apple Magic Keyboard and multi-touch Magic Mouse. Wide-screen: With LED back-lit 16:9 widescreen. Connectivity: USB 3.0 ports, dual thunderbolt 3 USB C ports, gigabit ethernet, 802.11ac, Wi-Fi and bluetooth 4.2. RAM: With 8GB RAM. Apple iMac Computer 27-Inch | 8GB | Living Social