This will fail, because it tries to load the 12.3 firmware from the IPSW, in either DFU or Recovery mode. You can try and revive using a second Mac with Apple Configurator 2. You’ll see the apple icon flash on boot 5-6 times before seeing the exclamation mark symbol telling you recovery is needed. You try to upgrade, the upgrade will fail but recovery to handle it correctly, you’ll reboot still on 12.2.1 but with a report a problem dialogue informing you of an iBoot Panic You’ll try to upgrade again. The reports are also filed on Reddit where a user states:
Apple configurator 2 revive update#
In another situation, the Mac finishes the macOS 12.3 update process and reboots to nothing but an “iBoot Panic” message. In one situation, the Mac is bricked that can not be further used. Take note that the new update only affects Macs that had their logic boards replaced, specifically Apple’s new 14-inch and 16-inch MacBook Pro models.Īs per the reports of macOS 12.3 bricking Macs, there are two potential results faced by users. Users have shared their grief on Apple’s Developer forum thread, citing that updating to the latest macOS 12.3 build leads their Macs to endless restart loops, errors, and ultimately bricking them. Apple’s Latest macOS Monterey 12.3 Update is Bricking Macs for Users Who Had Their Logic Boards Replaced #
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