The Mac OS 10.8 App Store would ONLY download the 19MB High Sierra Installer AGAIN!!! So I proceeded with that. Booted newly installed Mac OS X 10.8 and opened App Store (App Store still works fine just a little slow rendering images). Erased the Internal SSD drive with Disk Utility and Installed Mac OS X 10.8 fresh. Widgets let you offer even more value to your users, and the widget gallery makes it easy for them to find what they need. With iOS 14, you can use App Clips to give users a quick way to engage with a part of your app at the right moment. IOS is the world’s most advanced mobile operating system. ARKit 4 delivers exciting features for all devices with the A12 Bionic chip and beyond, while RealityKit lets you create even more realistic augmented reality experiences.