How to downgrade from macOS 26 Tahoe on a new Mac

"Negative consumer reaction to Liquid Glass has been overstated by some members of the Apple enthusiast media ecosystem, and Apple's data shows that iOS 26 adoption rates are roughly in line with those of the last few years. But the Mac's foray into Liquid Glass has drawn particular ire from longtime users (developers Jeff Johnson and Norbert Heger have been tracking persistently weird Finder and window resizing behavior, to pick two concrete examples, and Daring Fireball's John Gruber has encouraged users not to upgrade)."

"The answer to the first question is 'yes, usually,' and Apple provides some advice scattered across multiple documentation pages. This is an attempt to bring all of those steps together into one page, aimed directly at new Mac buyers who are desperate to switch from Tahoe to the more-familiar macOS 15 Sequoia."

New Mac users experiencing dissatisfaction with macOS 26 Tahoe's Liquid Glass redesign can downgrade to the previous macOS 15 Sequoia version. While Apple's adoption data shows typical upgrade rates, some longtime users and developers have reported issues with the new interface, including Finder and window resizing problems. Downgrading is generally possible, though Apple's guidance is scattered across multiple documentation pages. Users considering downgrading should be aware of security implications, as older macOS versions receive fewer security updates than current releases. This creates a trade-off between preferring familiar software and maintaining optimal system security.

Read at Ars Technica