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upraged to Big Sur how can i downgrade to Mac Catalina or Mojave?

I have upraged to Big Sur but my Archicad program is not running well how can i downgrade to Mac Catalina or Mojave?

MacBook Pro 15″, macOS 11.0

Posted on Feb 4, 2021 8:11 AM

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Posted on Feb 4, 2021 9:07 AM

Howdy,

First you will want to backup your Mac to save all your files.

Then follow the instructions from How to reinstall macOS

which includes:

On an Intel-based Mac that previously used macOS Sierra 10.12.4 or later, you can use Shift-Option-Command-R at startup to install the macOS that came with your Mac, or the closest version still available.

You may also want to refer to Restore shipping software

which assumes you have a Time Machine backup done before a beta install, but worth the read.

ivan

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