Various permutations have been provided to address the issue with the Mac OS Monterey update, resulting in Macs becoming unresponsive.
For those using an older Intel Mac without an Apple T2 chip, it is advisable to contact Apple if resetting the computer’s SMC and NVRAM does not work.
If you use an Apple T2 and have another Mac available, you can boot your Macs into a “DFU” recovery mode.
All you have to do is connect your “bricked” Mac to a second Mac using a USB or Thunderbolt cable, then use the Apple configuration app to restore the firmware.
To avoid any excitement or stress, users are advised not to install the new update until Apple has fixed the bugs and all vulnerabilities identified.
Apple’s new update not only updates macOS, but also includes firmware updates that will save users the hassle of installing various updates, providing the necessary firmware-level security and patches to mitigate hardware-level vulnerabilities such as Spectre, Meltdown and the like.
For more information, read the original story in Arstechnica.