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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
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.
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'.
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.
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'.
Thank you Eau Rouge I was successful. But lost some apps.Thats ok most of the time I use either my IPad 6 or 2015 MacbookPro.
But I would like to use the 27 IPad screen to enlarge images on my IPad and/or MacBookPro
How do I download High Sierra to a 2009 iMac running Yosemite
