The bug, which essentially prevented the affected Mac being turned on after updating to macOS Monterey, affected a small number of Intel Macs running the T2 security chip. While we have nothing direct from Apple, Apple blogger Rene Richie got the following statement from Apple: But what to do if your Mac has been bricked already? Don’t panic, and don’t let anyone wipe it! YouTuber Mr Macintosh has a fix… but that fix requires you to have a second Mac to hand. To bring your Mac back to life, you need to boot it into DFU mode and use the Apple Configurator 2 software restore the BridgeOS firmware. The bug affected Intel Macs featuring the T2 chip. This is quite a list of Macs, but reports of this bug have been sporadic. These Mac are kitted out with the Apple T2 security chip:
iMac (Retina 5K, 27-inch, 2020)iMac ProMac 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)
