And see here:The safe way would be to clone your current drive to a second one, and update that to Big Sur in order to test without "burning your bridges". I've been doing that with that old Mac Pro for quite a few years.
We use essential cookies to make this site work, and optional cookies to enhance your experience.
Please note that in order to help fund the site we may serve ads by via Google AdSense, and cookies may be used for personalisation of these ads to make them more relevant. These are optional and you can choose to enable/disable any such cookies in your preferences:
Click here for further information and to configure your preferences