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Point # 4 - Empty Space afterwards - it is suggested to keep at least 15% of the Drive Total Capacity as Empty Space for good operations of the computer and for additional updates to Monterey to download, expand and install. If upgrading from an earlier release, your Mac needs up to 44GB of available storage. Point # 3 - Empty Space Requirements > If upgrading from macOS Sierra or later, your Mac needs 26GB of available storage to upgrade.
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Point # 2- > How to upgrade to macOS Monterey Reports indicate the EFI BOOT ROM is Required to Flash the Computer and is a requirement for a Successful Monterey Installation. The EFI Boot ROM included in Monterey is verifying for Original Apple Drive and if not found, may Balk or fail to upgrade to Monterey. Point # 1A - There are reports appearing on the ASC Forums regarding failed installation of Monterey on older Qualifying Apple Computers. In most cases this is related to having a NON Apple Original internal drive ? Point # 1 - Does the > Computer Qualify for the Monterey upgrade
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The below points should be consider before attempting the upgrade.
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