Can't Update Xcode 11
Answer : Always working workaround (Manual download) Download directly from Apple: Latest Release version or Latest Beta version or Any version you need. And all other downloadable contents Then extract and move it where you like. This has so many benefits comparing to appstore update. (like the ability to resume download, not replacing the old one, not wasting hidden directories and etc.) Note that you should use safari to download it. Apple suggested workaround (Force App Store to redownload) Since This is Known Issues Xcode may fail to update from the Mac App Store after updating to macOS Catalina. (56061273) Apple suggest this: To trigger a new download you can delete the existing Xcode.app or temporarily change the file extension so it is no longer visible to the App Store.