Can Catalina be removed and Mojave or High Sierra be reinstalled on an old Air Mac?

My email program has slowed dramatically with Catalina. Any way to take Catalina off and reinstall Mojave?

MacBook Air 13″, macOS 10.15

Posted on Oct 1, 2020 05:57 PM

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dialabrain

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Posted on Oct 1, 2020 06:02 PM

Revert your Mac to a previous macOS version - Apple Support

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dialabrain

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133,529 points

Oct 1, 2020 06:02 PM in response to Quilter66

Revert your Mac to a previous macOS version - Apple Support

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Can Catalina be removed and Mojave or High Sierra be reinstalled on an old Air Mac?

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