Although most of this is reliably updated by installing macOS updates, two components have in the past been vulnerable to failure, recoveryOS and AppleDiagnostics. These are based on a foundation of Intel’s UEFI, with Recovery tools written as UEFI apps and for a cut-down version of macOS known as recoveryOS. These models lack any support for Secure Boot, and rely on a combination of fixed ROM, upgradeable firmware, and software stored on the boot disk. The answer to these questions depends on which architecture your Mac has, and how it stores and maintains the different parts of what we loosely refer to as firmware.
Apple configurator 2 revive install#
Let me ask you a simple question: supposing you installed the Monterey beta on an external disk, what would happen to that Mac’s firmware and its Recovery features? Given that Monterey is likely to bring firmware updates to most if not all Macs, how might that affect yours? That’s what I try to answer in this article – and it’s of great importance to all those who install beta-releases, as well as everyone considering upgrading in the autumn/fall.
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