The newest macOS Monterey replace, launched to the general public this week, is bricking Macs, changing their logic boards, inflicting panic amongst prospects who’re unable to get their Macs again to a working state. are unable, in line with a slew of consumer experiences posted on social media and Apple’s assist boards.


Apple this week launched macOS Monterey 12.3, which, amongst different issues, introduced common controls to customers. Sadly, not all customers are capable of expertise Common Management or the newest replace in any respect.

As chronicled on the Apple Developer Boards thread, customers who tried to replace their Macs to macOS 12.2.1 or earlier to macOS 12.3 had been met with errors, countless restart loops, and presumably a bricked Mac She goes. Studies are restricted to Macs whose logic boards have been changed, particularly the brand new 14-inch and 16-inch MacBook Professionals.

Mac OS 12.3 accommodates a firmware bug that makes it unattainable to put in the replace on any 2021 14 or 16-inch MacBook Professional that has had its logic board changed.

The cycle is:

you attempt to improve, the improve will fail however restoration to deal with it correctly, you’ll nonetheless reboot to 12.2.1 however an issue dialog with a report notifying you iBoot panic
You’ll attempt to improve once more. This time, iBoot FW will get corrupted. You will notice the apple icon flash on boot 5-6 occasions earlier than you see the exclamation mark, which tells you that restoration is required.
You possibly can attempt to revive utilizing one other Mac with Apple Configurator 2. It is going to fail, because it tries to load the 12.3 firmware from IPSW in DFU or restoration mode.
The one technique to get issues operating once more is to obtain 12.2.1 IPSW manually and use Apple Configurator 2, with the Mac in DFU mode, to load the regenerated picture. It will replace the firmware and restoration picture of the iBoot to a working construct. The Mac will then reinstall the OS to 12.2.

In accordance with experiences, customers are going through two attainable penalties. Both a Mac turns into bricked and unusable, or the Mac finishes the replace course of and reboots however doesn’t replace and shows an “iBoot panic” message.

MacOS 12 3 iBoot Panic Error


A thread on Reddit by customers additionally experiences related points. “When I attempt to improve to 12.3 on a 2021 M1 14 inch MacBook, your complete obtain after which improve sequence completes (30 or 40 minutes within the improve sequence) and when it reboots the improve would not occur and Nonetheless on 12.2.1,” mentioned one consumer.

If the Mac doesn’t boot after the replace sequences, customers should put their Mac in DFU and regenerate it manually. Nonetheless, this course of requires customers to have a second appropriate Mac to revive their bricked Mac. Since many shoppers have just one Mac, or no appropriate Mac to make use of the Apple configurator, they’re pressured to go to the Apple Retailer for help.

Even on account of a visit to the Apple Retailer, staff will probably have to exchange an already defective logic board with one other logic board, leaving customers in countless loops till the bug is patched. is put in. Customers are reporting typically blended outcomes when attempting to place their Macs into DFU mode, however a consumer on Reddit provided some recommendation:

Any try to get 12.3 in your Mac will fail with that error.

You need to be capable of enter DFU although – wait till the exclamation mark seems on the display screen after just a few flashes, then do the DFU key sequence. The configurator will allow you to attempt to revive in restoration mode, however undecided if it really works – I feel it is your error 21. You need to get error 2006 when attempting in DFU mode.

The second time I attempted a standard in system improve, the display screen refused to point out something on account of a firmware failure – however it nonetheless confirmed up within the configurator and the DFU key sequence nonetheless labored.

There are additionally experiences on MacRumors Discussion board, one consumer mentioned, “I am unable to set up macOS 12.3 in any approach: direct improve, set up through App Retailer, restoration mode, DFU restore, all fail. All variations previous to macOS 12.3 work. Me It’s essential to obtain IPSW for macOS 12.2 to make use of it.” Apple does supply IPSW recordsdata for macOS updates, however as acknowledged above, that course of requires a second Mac to be put in on a bricked Mac.

Apple has directions on resurfacing an Apple Silicon Mac right here and Intel-based Mac directions will be discovered right here. Apple has to date not commented or acknowledged the precise challenge bricking Macs making an attempt to replace to macOS 12.3, however we’ve got reached out to Apple for remark and can replace accordingly.



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