New Specifics Emerge on macOS 'Technical Debt'

- The "Tahoe" project name is associated with macOS 26, which introduced a significant redesign with a new "Liquid Glass" translucent interface. However, developers have criticized this new design for creating a less user-friendly experience, with some calling it a "grotesque UI regression." Specific complaints include that the new, more rounded window corners have a smaller, less intuitive target area for resizing, with as much as 75% of the clickable resize area now lying outside the window's corner. - UI convergence efforts have led to documented inconsistencies and bugs, which developers point to as evidence of accumulating technical debt. For example, Catalyst apps ported from iOS have exhibited "flashing" issues in sidebars when windows gain or lose focus, a problem that has persisted across multiple OS versions. Additionally, users have reported numerous visual glitches in macOS Tahoe, such as jittery animations in Mission Control and inconsistent UI elements, contributing to a feeling that the OS is "rushed." - App compatibility has been a significant issue, with many Electron-based applications, menu bar utilities, and network tools facing severe stability problems or being outright incompatible with macOS Tahoe. This has forced engineering teams to find and validate replacements for critical development tools, such as virtual machines and VPN clients, disrupting established workflows. - For engineering managers, this growing technical debt translates directly to decreased team productivity and lower morale. Teams with high technical debt spend significantly more time on bug fixes and understanding legacy code, which can reduce the time spent on developing new features by nearly 40%. The frustration of dealing with a buggy and inconsistent OS can also impact talent retention in a competitive market. - The annual release cycle for macOS is seen by some as a contributing factor to this technical debt, as it prioritizes shipping new features over addressing long-standing bugs. This contrasts with past releases like Mac OS X Snow Leopard, which was notable for its focus on performance improvements and bug fixes with very few new features. - Developers have also reported that the move to SwiftUI, while intended to be the future of Apple UI development, can lead to performance issues. Some have found that simple SwiftUI applications can have higher idle CPU usage compared to the same app built with the older AppKit framework, indicating potential inefficiencies in the newer framework. - App Store review times have become a source of frustration, with some developers reporting that their apps are "stuck" in the "Waiting for Review" status for as long as 22 days without any communication from Apple. These delays in the review pipeline can impede the timely rollout of bug fixes and new features for all apps, including those built with Catalyst and SwiftUI. - The transition to Apple Silicon, while largely successful, has created new complexities. Developers now need to manage builds for both Apple Silicon and Intel architectures, and issues have been reported with creating Universal applications in the latest versions of Xcode on macOS Tahoe. Furthermore, Apple has indicated that Rosetta, the technology that allows Intel-based apps to run on Apple Silicon Macs, will be phased out in a future version of macOS, adding pressure on developers to create native ARM applications.