IMAC upgrade
how do i upgrade from El Capitan 10.11 to at least 10.13
Imac will not support big sur
iMac 21.5″, OS X 10.11
how do i upgrade from El Capitan 10.11 to at least 10.13
Imac will not support big sur
iMac 21.5″, OS X 10.11
Your iMac must be a Late 2009 or newer to run High Sierra. This shows how to find your year model, from "About this Mac..." on an iMac running El Capitan:
IMAC upgrade