Every time I attempt to install the macOS Sequoia 15.1 Beta 2 IPSW (UniversalMac_15.1_24B5024e_Restore.ipsw
) it fails with the following error in installWithCompletionHandler:
Error Domain=com.apple.MobileDevice.MobileRestore Code=3194 "Declined to authorize this DFU file on this device for this user." UserInfo={NSLocalizedDescription=Declined to authorize this DFU file on this device for this user., NSLocalizedFailureReason=Bei der Installation ist ein unbekannter Fehler aufgetreten.}
I'm running macOS Sonoma 14.6.1, tried with both MobileDevice.pkg from Xcode 16 beta installed and with the official Device Support for macOS 15 beta
installed. In either cases it fails with the same error.
The upgrade also fails within a VM for both macOS Sequoia 15.0 Beta 7 and macOS Sequoia 15.1 Beta 2. After pressing Update Now
in System Settings › General › Software Update
the VM restarts and shows a crash report which unfortunately doesn't contain any useful info (and can't be sent since Apple ID login is only supported with a macOS 15 host...)
Anyone know how to solve this?