Download BAU (macOS Developer Beta Access Utility) and download the Mac installer for 1 hour after installation. The download is successful. However, when I click the downloaded installer, a pop-up is displayed stating that the file is damaged and cannot be installed, and the update cannot be performed. Is there any way to solve this problem? Or is there a way to install or update the ipsw file downloaded by DTK Mac mini alone? (The restore method seems to require another Mac.)