Apple's 21.5-inch iMac could go 4K next week

Apple may be adding a 21.5-inch iMac to its 4K Retina lineup as early as next week, according to a report.Currently, Apple only offers 4K iMac screens in 27-inch models, though rumors of a 4K 21.5-inch model first popped up in June and then again in August.According the 9to5Mac, Apple is getting ready to announce new 21.5-inch iMacs with 4K screens next week, and they could be in stores as early as October 13. The new models won't look very different to the current iMac models, but along with th