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How do I download High Sierra to a 2009 iMac running Yosemite

I need to update my late 2009 ImMac"s OS I recently restored it because of Grey screen and it now is running Yosemite.

Is High Sierra what I should to and how do I download and install it?


iMac, OS X 10.10

Posted on Jun 28, 2020 10:17 AM

Reply
Question marked as Top-ranking reply

Posted on Jun 28, 2020 10:49 AM

Please use Safari to access the following link, do not use Firefox


How to upgrade to macOS High Sierra - Apple Support


Before upgrading make a full back up of your Mac.


Check that third party apps you use have updates available for the new OS.

https://roaringapps.com

Check that your printers/ scanners etc have updated drivers and software available for the new OS.


Connect your mac to your router via cable rather than rely on WiFi.

Do not use your mac while it is downloading

and do not use any other devices that share the same internet connection.


If the App Store says' Open' then it is detecting a previous download of the install app

go to the Applications folder locate Install macOS High Sierra.app.

Move it to the Trash, empty the Trash.

Restart, click on the link again, the App Store should say ‘Get' or 'Download'.

3 replies
Question marked as Top-ranking reply

Jun 28, 2020 10:49 AM in response to Canfred22

Please use Safari to access the following link, do not use Firefox


How to upgrade to macOS High Sierra - Apple Support


Before upgrading make a full back up of your Mac.


Check that third party apps you use have updates available for the new OS.

https://roaringapps.com

Check that your printers/ scanners etc have updated drivers and software available for the new OS.


Connect your mac to your router via cable rather than rely on WiFi.

Do not use your mac while it is downloading

and do not use any other devices that share the same internet connection.


If the App Store says' Open' then it is detecting a previous download of the install app

go to the Applications folder locate Install macOS High Sierra.app.

Move it to the Trash, empty the Trash.

Restart, click on the link again, the App Store should say ‘Get' or 'Download'.

How do I download High Sierra to a 2009 iMac running Yosemite

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