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Last active October 10, 2025 00:23
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macos-solarium-commands.md

macOS26 Solarium Terminal Commands

Here's a quick reference for commands to tweak window transparency and vibrancy effects on macOS26.

What is Solarium?

"Solarium" is an internal name Apple uses for the system that controls window background effects in macOS26 (like translucency and vibrancy). Disabling Solarium makes app windows more opaque and less affected by the fancy background blur.

Commands

To enable or disable Solarium for an app or globally:

/usr/bin/defaults write <bundle> com.apple.SwiftUI.DisableSolarium -bool YES|NO
  • Replace <bundle> with the app's bundle ID (like com.apple.Safari) or use -g for global.
  • Use YES to disable, NO to enable.

To force Solarium for an app or globally:

/usr/bin/defaults write <bundle> com.apple.SwiftUI.IgnoreSolariumLinkedOnCheck -bool YES|NO

To check the current Solarium state:

/usr/bin/defaults read <bundle> com.apple.SwiftUI.DisableSolarium
/usr/bin/defaults read <bundle> com.apple.SwiftUI.IgnoreSolariumLinkedOnCheck

Note: These commands only work on macOS26.

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