Apple announced improvements to its Liquid Glass design language including a new transparency slider, updated sidebar behavior, and deeper integration into app icons. The changes respond directly to user feedback one year after the translucent system's debut.

Sidebars will now expand to the full edge of the window, with refraction effects continuing beneath them rather than cutting off at the sidebar boundary.

https://x.com/MacRumors/status/2064033454430511546
Sidebar icons will also retain their color, a change that addresses a common complaint about the original Liquid Glass implementation.
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