Apple has taken a new step in the test cycle of its computer system with the launch of macOS 26.4 beta 4 for developersThis compilation focuses primarily on refining the daily experience on the Mac rather than introducing spectacular features, but it already includes a number of changes worth keeping an eye on, especially for those who work with the computer daily in Spain and Europe.
The company maintains a fairly rapid pace of developmentWith betas arriving just weeks after the previous stable versions, macOS 26.4 is progressing in parallel with the rest of the company's platforms, but with a very practical focus: improving laptop battery life, tweaking Safari browsing, announcing the future end of Rosetta, and polishing bugs that have been causing problems for some time.
Key new features in macOS 26.4 beta 4
With this fourth developer beta, Apple consolidates the Main features of update 26.4This isn't a version that completely changes how you use a Mac, but rather a release that refines details, brings back familiar features, and lays the groundwork for more profound changes in future system revisions.
One of the main protagonists is the Compact tab view in SafariAfter removing it with the release of macOS 26, the company has been gradually bringing it back in recent betas, and at this stage, all signs point to its official return with the final version of macOS 26.4. For those who work with many tabs open simultaneously, this change could make all the difference.
macOS 26.4 beta 4 also continues to fix the known window resize pointer failureThis caused the cursor to not correctly follow the actual curve of the corners. The bug was initially listed as fixed in previous release notes, but was eventually reclassified as an outstanding issue and has continued to receive attention in these test builds.
Another important part of the update is power management. Apple has incorporated a configurable battery charging limit functionThis feature, inherited from popular third-party solutions among advanced users, allows you to set a charging limit between 80% and 100% directly from the system to try and extend battery life in the long term.
In parallel, the system has begun to show notifications when opening applications that still depend on RosettaEvery time a user launches an app that needs the translation layer to run on Apple Silicon devices, macOS 26.4 warns that this support is coming to an end and that compatibility will be removed in a future generation of the system.
Safari: Compact tabs and visual corrections
In the browser section, macOS 26.4 beta 4 reinforces the commitment to a more user-friendly Safari for those who have dozens of websites open at once. return of the compact eyelashes It allows for better use of screen space, especially on 13-inch laptops or computers connected to monitors with a lot of information open.
This change responds to the complaints from a part of the communitywhich never quite adapted to the tabbed view introduced with macOS 26. The gradual return of the compact view in the various betas makes it clear that Apple has taken the feedback to heart and preferred to backtrack on this specific point.
Along with this improvement, the company is finalizing the adjustments to cursor behavior at window cornersThe bug caused the resize indicator to not respect the actual shape of the interface, which was particularly annoying for users who frequently move and resize windows. Although the problem appeared to be fixed in previous versions, it has persisted and required further internal work.
These visual corrections aren't as flashy as a new AI feature, but they make a difference in daily use. For many users in Europe who spend a good part of their day between Safari tabs and application windows, Small improvements of this kind reduce friction and they make the system a little more pleasant to use.
Charging limits and battery health on Mac laptops
One of the most practical new features of macOS 26.4 beta 4 is the battery charging limit integrated into the systemUntil now, this type of control was usually handled by third-party utilities; with this update, Apple brings it to the settings panel natively for all compatible laptops.
The idea is simple: allow the user to set a maximum loadThe battery charge level should typically be between 80% and 100% to prevent it from remaining at 100% for too long. This seemingly minor detail helps reduce degradation over time, which is especially important in offices, workplaces, and homes where MacBooks are often plugged into their chargers.
This type of role is particularly interesting in the European professional sphere, where MacBooks have become commonplace in remote and hybrid work environments.Having a simple setting to care for the battery makes it easier for companies and freelancers to extend the lifespan of their equipment and delay the need to change devices or replace components.
macOS 26.4 beta 4 maintains the line of offering clear and easy-to-manage controls from System SettingsTherefore, there's no need to resort to external solutions or complicate things with advanced configurations. It's always advisable, however, to monitor how the device performs during the first few weeks and adjust the limit according to each user's actual needs.
Rosetta, announcements, and the future of apps on Apple Silicon
Another area where macOS 26.4 beta 4 focuses is on the Rosetta 2's futureThis technology has allowed Macs with Intel chips to run applications designed for Intel processors for years. While this translation layer has been fundamental to the transition, its lifespan is clearly limited.
With this beta, the system It starts displaying visible warnings when opening apps that depend on Rosetta.The message is clear: support won't last forever, and sooner rather than later, a version of macOS will arrive in which this technology disappears. The company has already hinted that the farewell will come with a future major update, so the clock has officially started ticking.
For developers, companies and professionals in Spain and the rest of Europe who still They maintain workflows based on legacy software.These warnings should serve as a wake-up call. It's a good time to plan migrations, explore native alternatives, and assess whether current tools already have versions optimized for Apple Silicon.
In practice, Apple's strategy aims to ensure the entire app ecosystem makes the complete transition to the new architecture. macOS 26.4 beta 4 doesn't yet change anything in terms of compatibility, but it does make it clear that the margin for maneuver is shrinking and that future generations of the operating system will require updated software.
Development pace and status of Siri in the ecosystem
macOS 26.4 beta 4 isn't arriving alone. Apple has been releasing it in parallel. iOS, iPadOS, watchOS betas and other systemsThis has resulted in a rather tight release schedule. For iPhones and iPads, much of the attention has focused on the promise of a smarter Siri and future integrations of advanced artificial intelligence.
In the case of the Mac, however, the immediate betting is more prudentAlthough the company has already announced its intention to strengthen the assistant across its entire product range, the first betas of cycle 26.4 suggest that Siri's major overhaul could be postponed for later iterations of the system or even for a future major version.
This doesn't mean macOS will remain unchanged; it simply means the current focus is on quality of life improvementsA slightly more user-friendly Safari, smarter battery management, app compatibility alerts, and bug fixes. It's the kind of update that might go unnoticed, but can have a significant impact on your daily life.
For European users and developers, this approach has a clear meaning: It's a good time to test, report bugs, and adjust workflowsThe goal is for the public release of macOS 26.4 to be as polished as possible. The most striking artificial intelligence features may take a little longer, but the groundwork is being laid little by little.
How to install macOS 26.4 beta 4 for developers
In this phase, macOS 26.4 beta 4 is available only for those who are part of the developer program from Apple. It's no longer necessary to install external profiles as before; the entire process is managed from within the system settings.
Before taking the plunge, it is advisable to Make a full backup of your MacWhether using Time Machine or your usual solution, we're talking about software in testing, with the associated risk of encountering bugs, unexpected crashes, or incompatibilities with applications crucial to daily work.
The way to download the beta involves going to System Settings > General > Software UpdateWithin this section appears the section dedicated to betas, from where you can select the macOS Tahoe Developer Beta channel, which is the internal name associated with version 26.4.
Once the channel is chosen, the system It will look for the build corresponding to macOS 26.4 beta 4 It will then offer to download and install the update. From there, the procedure is similar to any other macOS update: download, restart, and apply the changes. As always, it's best to allow some time for the process to complete without rushing.
With this new developer beta, Apple continues to shape a version of macOS that, without major headlines, It enhances stability, protects battery life, improves Safari, and alerts you to the end of Rosetta.For Mac users in Spain and the rest of Europe, the result is a system that is being refined step by step as the final version approaches, with an eye toward future releases that could bring more significant changes in artificial intelligence and advanced features.
