Apple has released the Release Candidate version of macOS 26.4, signaling that the public launch is imminent. This update carries particular significance as it marks the beginning of the end for Rosetta 2, Apple's translation layer that has enabled Intel-based applications to run on Apple Silicon Macs since the architecture transition began in 2020.
The Rosetta 2 Sunset Begins
The most consequential change in macOS 26.4 is the introduction of user-facing warnings when launching apps that depend on Rosetta 2. Users will now see notifications alerting them that the compatibility framework will be discontinued in future releases. Apple previously confirmed that macOS 27 will be the final version supporting Rosetta 2, making this a critical transition period for both developers and users.
This proactive notification strategy mirrors Apple's approach during previous major transitions, including the shift from PowerPC to Intel processors. By providing advance warning, Apple gives developers time to compile native Apple Silicon versions of their applications while preparing users for potential compatibility issues ahead. For enterprise environments and users relying on legacy software, this timeline creates urgency around migration planning.
The decision to phase out Rosetta 2 reflects Apple's confidence in the maturity of its Apple Silicon ecosystem. Six years after the first M1 Macs shipped, the vast majority of mainstream applications now run natively on ARM-based processors. However, niche professional tools, older utilities, and some enterprise software may still depend on translation, making these warnings essential for affected users.
Battery Management Comes to macOS
macOS 26.4 introduces native battery charge limiting, allowing users to cap maximum charge levels between 80% and 100%. This feature addresses a long-standing request from Mac laptop users concerned about battery longevity.
Lithium-ion batteries degrade faster when consistently charged to full capacity and kept at high charge states. By limiting the maximum charge to 80% or 90%, users who keep their MacBooks plugged in for extended periods can significantly extend battery lifespan. This has been common knowledge among power users, spawning several third-party utilities like AlDente and Battery Toolkit that offered this functionality.
Apple's native implementation eliminates the need for third-party solutions and integrates directly with the system's power management. The feature is particularly valuable for users who primarily use their MacBooks in clamshell mode or as desktop replacements, where the device remains connected to power most of the time. For mobile users who regularly drain their batteries, the default 100% limit remains appropriate.
Interface Refinements and Bug Fixes
The update resolves a persistent window resize cursor bug that has frustrated users since macOS 26's release. The issue caused the pointer to misalign with window corners during resize operations, creating a disconnect between visual feedback and actual interaction points. While seemingly minor, these interface inconsistencies impact the polish that Mac users expect from the platform.
Safari's compact tab view returns in this update after being removed in macOS 26. The compact view reduces vertical space consumption in the browser interface, maximizing content area on smaller displays. Its removal had generated user complaints, and its restoration demonstrates Apple's responsiveness to feedback during the beta cycle.
Creator-Focused Enhancements
Freeform, Apple's collaborative whiteboard application, gains new capabilities tied to Creator Studio subscriptions. Subscribers will access premium image libraries through the Content Hub, AI-powered upscaling for low-resolution images, and integration with OpenAI's image generation models.
This represents Apple's continued push into subscription-based creative services, positioning Freeform as more than a basic brainstorming tool. The OpenAI integration is particularly notable, bringing generative AI capabilities directly into Apple's native productivity suite. For creative professionals and educators using Freeform for visual collaboration, these additions could justify the subscription cost, though pricing details remain unclear.
What Release Candidate Status Means
A Release Candidate designation indicates Apple considers this build feature-complete and stable enough for public release, barring the discovery of critical bugs. Historically, RC builds either ship to the public unchanged or receive only minor bug fixes before general availability. Developers should treat this as the final opportunity to test their applications against the shipping version.
The timing suggests a public release within the next one to two weeks, likely coordinating with updates across Apple's other operating systems. Users currently running beta versions will receive the RC through the same Software Update mechanism, while the general public will see the update appear once Apple removes the beta designation. For most users, the decision to install immediately versus waiting depends on their tolerance for potential edge-case issues. The Rosetta 2 warnings won't affect users running only native Apple Silicon applications, while the battery charge limiting feature offers tangible benefits for specific use cases. The Safari and interface fixes improve daily usability without introducing risk.
