![]() Maleficent_Stranger's reddit comment, the bulk of which is reproduced here verbatim, offers more detail: Reports of having to install an intermediate version like Catalina or Big Sur beforehand appear to be incorrect, at least in this case. The new firmware showed the correct version, 428.40.10.0.0. Removed Sintech adapter/Crucial SSD, reinstalled Apple SSD, booted from Monterey USB installer, and installed Monterey normally. ![]() Put Apple SSD into OWC USB enclosure, boooted from Monterey USB installer, and attempted to install onto Apple SSD - same result.Repeated steps 2 and 3 with a macOS 10.14 Mojave installer on USB flash drive with same result.No error messages appeared, but Mac restarted and sat for some minutes with apparently no activity, then rebooted to installer. Began installation to HFS+-formatted Samsung SSD.Booted from macOS 12.0.1 Monterey installer on USB flash drive.Replaced stock 256GB Apple SSD with Sintech NGFF M.2 NVMe SSD adapter and Crucial P1 500GB NVMe SSD.Results of some cursory testing with a MacBook Air (13-inch, Early 2015) which was still running macOS 10.12 Sierra with Boot ROM version 02: UEFI firmware security in an Intel-based Mac.Cannot upgrade to Monterey with non-apple SSD.How can I avoid an error preparing macOS Monterey installation on a Mac with an OWC Aura Pro x2 SSD?.MacOS Monterey won’t install on non genuine Apple SSD.To resolve, reinstall an Apple SSD, install Monterey, reinstall your third-party SSD, and install Monterey: "An error occurred while preparing the installation."Compatible internal storage is required in order to update."."A required firmware update could not be installed.".If you've replaced the Apple SSD in your Mac with a third-party model and attempt to install Monterey, you may receive an error like: Monterey: "A required firmware update could not be installed." # Monterey: "A required firmware update could not be installed."
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