Attributes . Mac mini (Late 2018), , (November, 2018):Macmini8.1 3.6GHz i3, Macmini8.1 3.0GHz i5, Macmini8.1 3.2GHz i7, iMac w/Retina 5K display (27-inch Mid 2017), , (June 2017):iMac18.3 3.4GHz i5, iMac18.3 3.5GHz i5, iMac18.3 3.8GHz i5, iMac18.3 4.2GHz i7, iMac w/Retina 4K display (21.5-inch Mid 2017), , (June 2017):iMac18.2 3.0GHz i5, iMac18.2 3.4GHz i5, iMac18.2 3.6GHz i7 . Names