Upgrade to Catalina

How do I upgrade to Catalina not Big Sur from High Sierra? I need 10.15 I don't want to upgrade to Big Sur. There is no option in the App Store for Catalina.

iMac 27″, macOS 10.13

Posted on Jan 4, 2021 8:56 AM

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1 reply

BDAqua

Level 10

250,181 points

Jan 4, 2021 2:46 PM in response to gale39

Safe Boot, (holding Shift key down at startup).

Try the standalone 10.15.6 in Safe Mode, but not using Firefox...

https://apps.apple.com/gb/app/macos-catalina/id1466841314?ls=1&mt=12

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