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I cannot update my Sonoma or Upgrade to Sequoia. My MacBook Pro is only 3 months old. Every time I try i get the error message "Failed to personalise the software update. Please try again."
Probably related to the new concept of "Ownership" introduced with the M-series Macs. Try a DFU firmware Revive.
See my other post here:
Failed to personalize software update Mac… - Apple Community
Failed to personalise the software update. Please try again.
