Aqua
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Aqua
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| Developer | Apple |
|---|---|
| Introduced | January 2000 (Macworld) · shipped with Mac OS X (2001) |
| Type | macOS design language |
| Succeeded by | Liquid Glass (macOS Tahoe, 2025) |
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Aqua was the face of Mac OS X for a quarter century — the water-themed design language Steve Jobs unveiled with the promise that "we made the buttons on the screen look so good you'll want to lick them." Gel-like buttons, pinstripes, drop shadows, and the genie effect announced that the Mac's NeXT-based rebirth would look as new as it was.
1 Evolution✎
Aqua never stood still: the candy gels gave way to brushed metal, then to the unified gray of the late 2000s; OS X Yosemite (2014) flattened it in iOS 7's image; macOS Big Sur (2020) rounded and lightened everything toward iPad idioms. The name outlived most of its original pixels — officially, every macOS appearance from 10.0 through the mid-2020s was still "Aqua."
2 Position✎
Aqua set the template for consumer OS design in the 2000s and defined the Mac's personality through four processor architectures. Its era closed when Liquid Glass arrived with macOS Tahoe — the first design language since 2001 to replace, rather than renovate, what Aqua began.