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late 2015 imac trying to reinstall os x yosemite

There is no disk for me to select when it says "Select the disk where you want to install Mac OS X"

iMac 27″, macOS 11.1

Posted on Feb 14, 2021 9:51 AM

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46,008 points

Posted on Feb 14, 2021 10:14 AM

You can’t install Yosemite on a Late 2015 iMac. It must be OS X El Capitan or later. You can get old versions here: https://support.apple.com/en-us/HT211683, or get Big Sur: https://support.apple.com/en-us/HT201475.

Cheers,

Jack

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