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iMac 14,1 with OS Sierra 10.12.6 upgrade to Catalina

I have an iMac 21.5 inch, Late 2013 (14,1) with OS Sierra 10.12.6. and want to upgrade to

OS Catalina. No update or upgrade options at all showing in 'About This Mac/software update' nor in Appstore 'updates' or 'featured'. Not even High Sierra.

How do I upgrade?

iMac 21.5″, 10.12

Posted on Feb 13, 2021 6:44 AM

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Question marked as Top-ranking reply

Posted on Feb 13, 2021 6:46 AM

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https://apps.apple.com/us/app/macos-catalina/id1466841314?mt=12

8 replies

Feb 21, 2021 8:33 AM in response to dialabrain

With the Catalina installer.app in my application folder I'm trying to create a bootable usb disk using this command in the terminal:

sudo /Applications/Install\ macOS\ Install macOS Catalina.app/Contents/Resources/createinstallmedia --volume /Volumes/SanDisk1


the terminal's response: /Applications/Install macOS Catalina.app does not appear to be a valid OS installer application.


After looking around on the web I noticed I'm not the only one with this problem. I've tried another suggested approach by

using a to the desktop copied Catalina.app instead with this command:


sudo /Users/MYNAME/Desktop/Install\ macOS\Catalina.app/Contents/Resources/createinstallmedia --volume /Volumes/SanDisk1


terminal's response: sudo: /Users/MYNAME/Desktop/Install macOSCatalina.app/Contents/Resources/createinstallmedia: command not found


yes, i used my real name instead of MYNAME .


I do need to make a clean install since i've been accumulating junk for years and it has to go.


Please help.

Thanks

Feb 21, 2021 8:38 AM in response to Vortex99

Vortex99 wrote:

With the Catalina installer.app in my application folder I'm trying to create a bootable usb disk using this command in the terminal:
sudo /Applications/Install\ macOS\ Install macOS Catalina.app/Contents/Resources/createinstallmedia --volume /Volumes/SanDisk1

The correct command…

sudo /Applications/Install\ macOS\ Catalina.app/Contents/Resources/createinstallmedia --volume /Volumes/Sandisk1


iMac 14,1 with OS Sierra 10.12.6 upgrade to Catalina

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