Figured it out. The notarytool I tried from Xcode 14.3.1 is broken as it doesn't bundle (or hard link) the libswift_Concurrency.dylib. However copying a notarytool from Xcode 13.4.1 (as Quinn did above) works: % ~/Desktop/notarytool OVERVIEW: Manage submissions to the Apple notary service USAGE: notarytool <subcommand> Perhaps it has been fixed in a more recent Xcode build?

Moved to a comment on Quinn's post

This is still happening for me with latest Xcode beta on Ventura. It's bloody annoying when it starts happening. It's even continuing after a reboot! I've filed a Feedback on it, if that helps: FB11344760 with this info Details Failed to prevent system sleep during UI testing. Error code: -536870211 Domain: IDEFoundationErrorDomain Code: 1 User Info: {     DVTErrorCreationDateKey = "2022-08-22 22:52:06 +0000"; } -- System Information macOS Version 13.0 (Build 22A5321d) Xcode 14.0 (21322) (Build 14A5284g) Timestamp: 2022-08-22T17:52:06-05:00