Downgraded to Maverick - Now I can't upgrade

My computer was running incredibly slow so I did a quick Google search and came to the conclusion that I should re-install the operating system. I was running Big Sur (on an older computer) but when I went to reinstall it would only reinstall to Maverick. I did so and now I can't upgrade any further which, among other things, won't even let my mouse scroll vertically. Help?

iMac Line (2012 and Later)

Posted on Apr 20, 2021 8:39 AM

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Posted on Apr 20, 2021 8:43 AM

Click on this link to read how to get different versions of macOS - https://support.apple.com/HT211683

- You may find you need to use Safari to get links for High Sierra and later using the Mac App Store application to open a functioning page.

- Sierra, El Capitan, and Yosemite download as a .pkg. Click on this to have a converted version placed in your Applications folder as an "Install OS..." application. Run the installer and follow the directions.

- Upgrades may take some time (up to an hour or more) to install, with restarts and blank screens.


Before upgrading, back up your data in case something goes wrong. See this support document: Back up your Mac with Time Machine - https://support.apple.com/HT201250 or use a cloning tool.


How to upgrade to macOS Big Sur - Apple Support

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Question marked as Top-ranking reply

Apr 20, 2021 8:43 AM in response to CallYourSponsor

Click on this link to read how to get different versions of macOS - https://support.apple.com/HT211683

- You may find you need to use Safari to get links for High Sierra and later using the Mac App Store application to open a functioning page.

- Sierra, El Capitan, and Yosemite download as a .pkg. Click on this to have a converted version placed in your Applications folder as an "Install OS..." application. Run the installer and follow the directions.

- Upgrades may take some time (up to an hour or more) to install, with restarts and blank screens.


Before upgrading, back up your data in case something goes wrong. See this support document: Back up your Mac with Time Machine - https://support.apple.com/HT201250 or use a cloning tool.


How to upgrade to macOS Big Sur - Apple Support

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Downgraded to Maverick - Now I can't upgrade

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