Use a different apple id for reinstall os x

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MacOS updates prior to Mojave follow this set of instructions: That includes Safari, iTunes , Books, Messages, Mail, Calendar, Photos, and FaceTime. When Software Update says your Mac is up-to-date, the installed version of MacOS and all of it's apps are also up to date. MacOS Mojave or Later follow this set of instructions : Or click More info to see details about each update and select specific updates to install. , then click Software Update to check for updates. Then follow the instructions for the version of the MacOS you have.

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How to Update the OS software on your Mac, Mojave or laterįor all MacOS upgrades follow steps 1 and 2 below.