Apple publishes a statement about macOS 12 Monterey upgrade issues
Earlier this month, reports emerged about macOS 12 Monterey bricking older Mac machines. In short, upgrading to Apple's latest OS resulted in devices being unable to boot, not even into macOS Recovery. Initially, Apple proposed some workarounds, upon which it has now expanded.
According to Rene Ritchie, Apple has published the following statement on the matter:
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.
Apple released a fair amount of machines with its T2 security chip. We have included a list of them below. Ultimately though, Apple's statement will be of no use to people whose devices macOS 12 Monterey bricked. As we reported previously, the options open for these devices are to take it to Apple or use Apple Configurator 2 to reset its T2 chip. Unfortunately, you must have another Mac to hand to reset the chip on a bricked device.
Additionally, macOS 12 Monterey affected devices without a T2 security chip, too. Seemingly, Apple is yet to release a fix for these devices. The devices that have a T2 security chip are:
- 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, 2x Thunderbolt 3 ports)
- MacBook Pro (13-inch, 2020, 4x Thunderbolt 3 ports)
- MacBook Pro (16-inch, 2019)
- MacBook Pro (13-inch, 2019, 2x Thunderbolt 3 ports)
- MacBook Pro (15-inch, 2019)
- MacBook Pro (13-inch, 2019, 4x Thunderbolt 3 ports)
- MacBook Pro (15-inch, 2018)
- MacBook Pro (13-inch, 2018, 4x Thunderbolt 3 ports)