Thank you, but that's how far I got myself. It is telling me there are no downloads available at this time. I am asking, because I am still on 10.14.5 and I thought the Xcode 11 beta might only be available on the 10.15 beta.
Check the “Applications” tab, the Xcode download is there (they redesigned the page, which makes it IMO worse). No idea if it runs on Mojave, but I would think so based on history.
>To use the SwiftUI design canvas Xcode 11 must running on macOS Catalina.
Please let us know if you find that's incorrect.
[0] https://developer.apple.com/xcode/whats-new/