iOS 27 Lets You Turn Liquid Glass Down, and That Says a Lot About the Redesign
Apple's 27-series software releases arrive with a transparency slider, broad speed gains and a new Siri that comes with daily usage limits.
Apple released iOS 27, iPadOS 27, macOS 27, watchOS 27, visionOS 27 and tvOS 27 on 14 September. The headline feature is Siri AI, a rebuilt assistant that launches as a beta in English. For anyone who cares about interface design, though, the more revealing change is a slider. A new control in Settings lets people adjust Liquid Glass, the translucent material Apple introduced last year, anywhere from what Apple calls ultraclear to fully tinted. App icons have also been redrawn to look sharper and more defined.
A design system that admits it needs a dial
Liquid Glass was Apple's most ambitious visual change in more than a decade, and its central idea was that controls should float above content as a refractive layer rather than sit on opaque bars. The cost of that idea is legibility. Translucent surfaces look extraordinary over a calm photo and much less so over busy text, and the system has to make a judgement call about contrast thousands of times a minute.
Making the material adjustable is a sensible fix, and an honest one. It concedes that no single setting serves everyone: people with low vision, people who read in bright sunlight and people who simply prefer solid surfaces now have a direct way to say so, without hunting through accessibility menus for Reduce Transparency. Design systems rarely ship with a strength control. That this one now does suggests the argument over it was real.
The sharper icons point the same way. The first year of a new visual language is usually about establishing it; the second is about sanding off what did not work. iOS 27 is clearly a second-year release.
Speed as a feature
Apple is leaning hard on performance claims this year. It says apps launch up to 30 per cent faster on iPhone and iPad, photos load up to 70 per cent faster after being taken, and AirDrop transfers are up to 80 per cent faster. On iPad, copying files to an external USB drive is up to five times faster, and window management is smoother. On the Mac, Apple says switching spaces and Mission Control feel more fluid. In Messages, sending a large video on a weak connection no longer holds up the texts that follow, which is the kind of fix people notice without knowing why.
These are "up to" figures and will vary by device. But the emphasis matters: polishing responsiveness is a better use of a release cycle than another layer of features, and it is the work users feel every day.
Siri AI arrives with conditions
Siri AI promises personal context across messages, email and photos, awareness of what is on screen, a camera mode on iPhone and a dedicated Siri app that syncs conversation history through iCloud. It also arrives with caveats that deserve as much attention as the features:
- Language and region. English only at launch, with French, Japanese, Korean, Portuguese and Spanish due in October. It is not initially available in the EU on iPhone, iPad or Apple Watch, though Mac and Vision Pro users there can use it. It is not available in China.
- Daily limits. Apple says features that rely on server-side models, including Siri AI, its photo editing tools and Image Playground, are subject to daily usage limits, and that expanded access will be available for a fee in the future.
- Hardware cut-off. Apple Intelligence features need an iPhone 15 Pro or later, a Mac with M1 or later, or one of a handful of other supported devices.
The usage limits are the most significant line in the release notes. Apple has spent years presenting intelligence features as part of the device you already paid for. Metering them, and signalling a paid tier, brings Apple's assistant closer to the subscription model its competitors use. It is a reasonable response to the cost of running large models, but it changes what buying an iPhone gets you.
What to watch
Two things will define how this release is remembered. The first is whether the Liquid Glass slider quietly becomes the setting most people change on day one; if it does, expect the default to move next year. The second is where Apple draws the line on Siri AI usage, because that threshold will decide whether it feels like part of the phone or a trial of something you will eventually rent.
Sources