Apple has released the first developer beta of macOS Tahoe 26.4, arriving just days after the public launch of macOS 26.3. Developers can access the update through System Settings under Software Update, provided a developer profile is installed. The build number is 25E5207k, and while the update is primarily aimed at testing, it already hints at several new features and refinements.
macOS 26.4 is expected to introduce new emoji and enhancements to Apple Intelligence features. While rumors suggested a major update to Siri powered by Google Gemini, reports indicate that some of those AI-driven capabilities may arrive in later releases. The update could also expand support for Anthropic’s MCP protocol, which enables AI tools to interact with apps and platforms, building on agentic features introduced in Xcode 26.3. The beta is still being explored, but early signs suggest subtle interface improvements and system refinements.
A key addition in macOS 26.4 is the Charge Limit feature, previously available only on iPhone and iPad. Mac users can now set a maximum battery charge between 80% and 100% to help extend battery lifespan. Devices will occasionally reach full charge to maintain accurate battery estimates, but the slider offers more control for everyday use. Charge Limit is also integrated with the Shortcuts app, allowing users to automate battery charging preferences. This addition is particularly useful for MacBook users who often remain plugged in at a desk.
The macOS Tahoe 26.4 developer beta is currently limited to registered developers, with a public beta expected soon. Download sizes vary, ranging from 8 to 18 gigabytes depending on the system. While the full scope of updates is still emerging, the focus on battery management and incremental AI improvements gives a clear sense of Apple’s priorities for the next macOS release.
