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Fix the issue in macOS when WindowTransparencyLevel is set to AcrylicBlur - #22144

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Linlccc wants to merge 1 commit into
AvaloniaUI:mainfrom
Linlccc:fix-window-transparency
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Fix the issue in macOS when WindowTransparencyLevel is set to AcrylicBlur#22144
Linlccc wants to merge 1 commit into
AvaloniaUI:mainfrom
Linlccc:fix-window-transparency

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@Linlccc

@Linlccc Linlccc commented Sep 4, 2026

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What does the pull request do?

Fix the issue in macOS when WindowTransparencyLevel is set to AcrylicBlur

  1. Background fully white in inactive state
  2. Unusable when dark theme and white content behind window

What is the current behavior?

See #18453

What is the updated/expected behavior with this PR?

Dark Mode Activation
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Dark inactive
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Light activation
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Light inactive
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Fixed issues

Fixes #18453

1. Background fully white in inactive state
2. Unusable when dark theme and white content behind window
@MrJul MrJul added bug os-macos backport-candidate-12.1.x Consider this PR for backporting to 12.1 branch labels Sep 4, 2026
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backport-candidate-12.1.x Consider this PR for backporting to 12.1 branch bug os-macos

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Successfully merging this pull request may close these issues.

In macOS, setting TransparencyLevelHint to AcrylicBlur results in an abnormal display.

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