I get the same error using the Xojo IDE (url not permitted). The debugged app has an ad-hoc code certificate. Shouldn't this be enough for Instruments? macOS 11.2 and Instruments 12.5. Problem solved: was missing the correct entitlement.

Of course, you are correct. I'm using Xojo and the code is a bit different. I have a class to remove files. It gets the authorisation and the uses Filemanager with authorisation to delete some files: Private Property theFileManager As NSFileManagerMBS Public Sub Constructor(hasAppName as String, hasAuthorization as NSWorkspaceAuthorizationMBS, doRegistration as Boolean) AppName = hasAppName myAuthorisation = hasAuthorization theFileManager = NSFileManagerMBS.fileManagerWithAuthorization(myAuthorisation) DeleteApp if doRegistration then removeRegistration End Sub And Delete App: AppFolder = SpecialFolder.Applications if AppFolder <> nil and AppFolder.Exists then AppFolder = AppFolder.Child(AppCommon.getInstallationAppName) if AppFolder = Nil or not AppFolder.Exists or not AppFolder.Directory then Return dim theError as NSErrorMBS dim theResult as Boolean = theFileManager.removeItem(AppFolder, theError)

I've got the same error today so the bug is not fixed!