Is there a table that tells us which MacOSs will work with which models of iMac?
Is there a table that tells us which MacOSs will work with which models of iMac?
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No. But using the product description (blah) information of Apple menu > About this Mac > and comparing that info to the hardware requirements at How to get old versions of macOS - Apple Support, you will know what hardware can permit upgrades to various versions of macOS.
