Thanks, it's essentially what I already did try. ![]() Machine board ID is Mac-A61BADE1FDAD7B05. Maybe someone knows a way to trigger firmware update of T2 Mac similar to method by Pepijn Bruienne?.Maybe someone knows how to set different destination for softwareupdate -d & softwareupdate -i methods?.Maybe there's some tool or article that describes how to fetch standalone Combo Update for specific macOS of particular Mac model?.More questions that may give me some options: I'm afraid to try installing fresh copy of macOS to external SSD on this computer so the firmware gets updated during installation because users report installing recent macOS releases to expternal USB-C drives destroys or damages all Recovery partitions (including located on internal SSD). This didn't work, no T2 Mac updates found in the package, here's log of my struggle. That PKG should've contained firmware update for this Mac: the one that can be found in latest macOS Catalina Security Update 2 and which bumps firmware to match Big Sur 11.6.4 and Monterey 12.2 (according to this article). ![]() I have already tried installing FirmwareUpdate.pkg using a well-known method by Pepijn Bruienne. ![]() ![]() Is there some way to update EFI firmware (BootROM & iBridge) without updating macOS Big Sur or macOS Monterey on an Intel Mac with T2 chip? Mac is capable of running macOS Catalina.
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