is the IMAC 21.5 inch Mid 2010 not one to upgrade the OS High Sierra 10.13.6 ?
I have an IMC 21.5 inch mid 2010. Will I not be able to upgrade, I'm now at High Sierra 10/13/6 ?
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High Sierra 10.13.6 is the last upgrade available for a mid-2010 21.5" iMac.