Anyone find a solution to this problem? I am having the same issue, I woke up one morning and could not build my iOS app. The components area shows "Status unavailable" for all my platforms besides macOS. I have no way of re-downloading the runtimes and have gone through steps of rebooting my machine, deleting Xcode and re-installing, clearing out all the cache, downloading older Xcode, etc. I have found no way to get Xcode to build my apps and no way to run an iOS simulator. A very frustrating problem as I have no idea what else I can do. The only thing that seems to have had any reaction in Xcode at all is removing the Images.plist file, but even then I can't get it to the point where I can compile my app. It only gives me the ability to download the iOS platform via a "Get" button, at which point the actual download hangs.