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my imac is currently on the macOS High Sierra operating system. when i go into the app store to update the OS system there is no update available. How can i update my OS to the Big Sur


how do i update to the Big Sur operating system

iMac 21.5″, macOS 10.13

Posted on Mar 11, 2021 3:10 PM

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Posted on Mar 11, 2021 3:16 PM

that would depend on the year and size of your imac. you can check compatibility for big sur and find the download here: How to upgrade to macOS Big Sur - Apple Support.


if it's not compatible with big sur, you can check compatability for an older (but more recent than high sierra macOS) here:

How to get old versions of macOS - Apple Support

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Question marked as Top-ranking reply

Mar 11, 2021 3:16 PM in response to peteypie8

that would depend on the year and size of your imac. you can check compatibility for big sur and find the download here: How to upgrade to macOS Big Sur - Apple Support.


if it's not compatible with big sur, you can check compatability for an older (but more recent than high sierra macOS) here:

How to get old versions of macOS - Apple Support

my imac is currently on the macOS High Sierra operating system. when i go into the app store to update the OS system there is no update available. How can i update my OS to the Big Sur

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