Apple says it's fixed a macOS Monterey bug that bricked some Macs

· iMore

Source: Bryan M. Wolfe / iMore

What you need to know

  • Some users previously reported their Macs would refuse to start up after updating to macOS Monterey.
  • Apple says that it has fixed a bug and that it was related to its T2 security chip.

Apple says that it has fixed a bug that prevented some Macs from starting up properly after being updated to macOS Monterey. The bug, which only seemed to impact those machines running an Apple T2 security chip, was lighting up social media and Apple's support channels.

According to Apple, via a statement provided to Rene Ritchie, says that the bug has now been fixed and that those impacted should contact Apple for help.

We have identified and fixed an issue with the firmware on the Apple T2 security chip that prevented a very small number of users from booting up their Mac after updating macOS. The updated firmware is now included with the existing macOS updates. Any users impacted by this issue can contact Apple Support for assistance.

These are the Macs that have the Apple T2 Security Chip built in:

  • iMac (Retina 5K, 27-inch, 2020)
  • iMac Pro
  • Mac Pro (2019)
  • Mac Pro (Rack, 2019)
  • Mac mini (2018)
  • MacBook Air (Retina, 13-inch, 2020)
  • MacBook Air (Retina, 13-inch, 2019)
  • MacBook Air (Retina, 13-inch, 2018)
  • MacBook Pro (13-inch, 2020, Two Thunderbolt 3 ports)
  • MacBook Pro (13-inch, 2020, Four Thunderbolt 3 ports)
  • MacBook Pro (16-inch, 2019)
  • MacBook Pro (13-inch, 2019, Two Thunderbolt 3 ports)
  • MacBook Pro (15-inch, 2019)
  • MacBook Pro (13-inch, 2019, Four Thunderbolt 3 ports)
  • MacBook Pro (15-inch, 2018)
  • MacBook Pro (13-inch, 2018, Four Thunderbolt 3 ports)

None of this impacted the latest M1 Pro or M1 Max notebooks that ship with macOS Monterey already installed, thankfully. Those machines are among the best Mac notebooks ever made and we can only imagine what Apple silicon we will see in the future. Hopefully showstopping macOS Monterey bugs will be a thing of the past, however.

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