Modify window appearance in macOS Tahoe

Jul 3, 2026

If you dislike the new Finder and window appearance in macOS Tahoe, you can revert to the Sequoia UI using the following commands. This will disable the floating sidebar and decrease the corner radius :

defaults write -g NSSplitViewItemSidebarDefaultsToFloatingAppearance -bool false
defaults write -g NSConvolutionOverride1 -float 10
killall Finder

For square corners :

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defaults write -g NSConvolutionOverride1 -float 1
killall Finder

To revert all back :

defaults delete -g NSSplitViewItemSidebarDefaultsToFloatingAppearance
defaults delete -g NSConvolutionOverride1
killall Finder

Written by La Clementine

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A sysadmin specializing in Apple (and clementine). I create scripts, apps, and tutorials for managing Macs in organizations and modern workplace environments.

Responses (1)

Framer Picks

Jul 3

Apple loves to forcefully redesign our entire workflow and just expect us to deal with it, so having the actual commands to violently revert their UI changes is a godsend. Thank you so much for sharing this. I appreciate it!