Liquid Glass was designed for OLED screens, but most Macs still use LCD panels. That mismatch is the real reason Apple is preparing a "slight redesign" of the visual language in macOS 27, according to Bloomberg's Mark Gurman. The glassy interface debuted with macOS 26 Tahoe last year and immediately drew criticism for poor text readability, especially in Finder, Control Center, and apps with dense sidebars. Transparency effects and shadows that look crisp on iPhone and Apple Watch OLEDs turn muddy on Mac LCD panels, reducing "text clarity or create interface confusion," Gurman wrote in his Power On newsletter.
Apple's internal teams describe the Tahoe implementation as "a not-completely-baked implementation from Apple's software engineering team." The macOS 27 changes are meant to deliver Liquid Glass "the way Apple's design team intended it from the start" rather than scrap the design language entirely. The fixes target "shadows and transparency quirks," adjusting contrast and readability without dramatically changing how Liquid Glass looks. Apple reportedly still sees the design as a net positive and a major part of its future direction.
This mirrors the company's approach after iOS 7, when it spent the following release sanding down rough edges instead of starting over. On the hardware side, an OLED touchscreen MacBook expected as soon as this year could make Liquid Glass look significantly better. But for the millions of Macs still running LCD panels, the software refinements in macOS 27 will have to do the heavy lifting.
Beyond the UI tweaks, Apple is positioning macOS 27 as a reliability and performance release. The company will reportedly emphasize bug fixes, battery-life upgrades, and efficiency improvements, similar to the marketing around iOS 12.
Code cleanup is a theme across all "27" operating systems. The marquee feature across macOS 27 and iOS 27 will be a revamped Siri with chatbot functionality, powered by Gemini-based models, alongside upgrades to Apple's AI platform. Siri and Spotlight Search will also be unified.
Apple will unveil macOS 27, iOS 27, iPadOS 27, and visionOS 27 at WWDC on June 8.
