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unable to download Mac OS 10.13

Hi, I'm trying to upgrade my iMac to Mac OS 10.13 (High Sierra) but could not download this OS from Apple website. Keep getting the error "this copy of OS is corrupted" when click on download.


My iMac is late 2009 model and my current Mac OS is 10.12.6. I understand I should be able to upgrade to Mac OS 10.13.6 (High Sierra).


Anyone knows how I can get this OS upgrade done?

iMac, macOS 10.12

Posted on Jul 25, 2020 7:29 AM

Reply
Question marked as Best reply

Posted on Jul 25, 2020 7:50 AM

I bet you the App Store High Sierra page is saying Open.

The error message you are seeing is the App Store noticing that you have a copy of Install macOS High Sierra.app in your Applications folder. Locate it, move it to the Trash, empty the trash.

Connect your mac to your router via cable.

Restart your mac.

Open Safari do not use Firefox, click on the link below,

How to upgrade to macOS High Sierra - Apple Support

Go to Section 4 and click on Get macOS High Sierra.

You will be directed to the App Store High Sierra page,

this time it will say Get or Download.

Start the download, do not use your mac while it is downloading

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

4 replies
Question marked as Best reply

Jul 25, 2020 7:50 AM in response to jackq

I bet you the App Store High Sierra page is saying Open.

The error message you are seeing is the App Store noticing that you have a copy of Install macOS High Sierra.app in your Applications folder. Locate it, move it to the Trash, empty the trash.

Connect your mac to your router via cable.

Restart your mac.

Open Safari do not use Firefox, click on the link below,

How to upgrade to macOS High Sierra - Apple Support

Go to Section 4 and click on Get macOS High Sierra.

You will be directed to the App Store High Sierra page,

this time it will say Get or Download.

Start the download, do not use your mac while it is downloading

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

unable to download Mac OS 10.13

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