failed to personalize the software update
M2 Macbook air trying to install "macOS Sequoia 15.1.1.
Software starts to download then we get Message "failed to personalize the software update".
Thanks for your help
MacBook Air (M2, 2022)
Try booting into safemode then try the update from there. If successful, reboot back to your normal account and test to see if the update is verified by going to About this Mac.
Start up your Mac in safe mode - Apple Support