Apple Seeds Fourth Beta of macOS Big Sur to Developers - MacRumors
Skip to Content

Apple Seeds Fourth Beta of macOS Big Sur to Developers

Apple today seeded the fourth beta of the upcoming macOS Big Sur update to developers for testing purposes, two weeks after releasing the third beta and over a month after the new update was unveiled at the Worldwide Developers Conference.

macOS BS Beta 1
The macOS Big Sur beta can be downloaded through the Apple Developer Center and once the appropriate profile is installed, subsequent betas will be available through the Software Update mechanism in System Preferences.

macOS Big Sur introduces a refreshed design to the Mac operating system, overhauling the entire look from the curvature of the window corners to the dock icons to the system sounds. Everything feels fresh but familiar, with a lighter and more modern appearance. There's a new customizable Control Center that mirrors the Control Center on iOS devices, putting key system controls right at your fingertips.

The Notification Center has been redesigned with iOS-style widgets that are available in multiple sizes, plus there are more interactive notifications that are now grouped by app to make it easier to see what's going on.

Safari is faster and more battery efficient, plus there's a new start page that can be customized with wallpapers and sections that include Reading List and iCloud Tabs, which makes Safari more tailored to your individual usage needs.

Tabs have been redesigned, there's a built-in language translation feature, and Chrome and Firefox Extensions can be ported to Safari. There's also an option to choose which sites an extension works with for greater privacy. Speaking of privacy, a new Privacy Report feature lets users know the trackers Safari is blocking when you visit websites.

Messages is more similar to the Messages app on iOS with support for pinned conversations, mentions, inline replies, and Memoji creation, plus the built-in search feature has been overhauled to make it easier to find links, photos, and conversations in the app.

Apple redesigned the Maps app to add support for Look Around, indoor maps, and Guides, which are lists of notable attractions, restaurants, and more created by trusted sources. Maps can also be used to generate directions for cycling routes and electric vehicle trips that can be sent to iPhone, and shared ETA updates are now viewable on the Mac.

Photos includes a better Retouch tool, Apple Music's For You section has been replaced with a Listen Now section, HomeKit Secure Video cameras support Face Recognition and Activity zones, and Siri can answer a wider range of questions than before.

As of macOS Big Sur beta 2, Apple Pay support is available for Mac Catalyst apps. Developers will now be able to easily get ‌Apple Pay‌ up and running in Mac Catalyst apps. From the iOS 14 release notes: "‌Apple Pay‌ support is now available to Mac Catalyst apps. Two methods have been added to existing delegate protocols. No changes are required for iPad apps, but one or both of these methods must be implemented when building for Catalyst."

In the future, the macOS Big Sur App Store will help users better understand privacy practices with clear info on the information that an app collects, and after installing macOS Big Sur, you'll see faster updates that begin in the background and then finish more quickly to make it easier to keep your Mac up to date.

Apple in the third beta of macOS Big Sur changed the battery icon for the Battery section in System Preferences, refining the design to make it look more clean and streamlined. There update also brought a new design for the Music app icon (it's red), and some color changes to the buttons and icons inside the music app.

batteryhealthbigsur
Today's beta adds 4K support for YouTube videos in Safari. For more on everything that's new in macOS Big Sur, make sure to check out our roundup.

Related Forum: macOS Big Sur

Popular Stories

Apple Event Logo

Apple to Release These 15 New Products Later This Year

Friday June 12, 2026 7:45 am PDT by
Apple's annual WWDC developers conference is drawing to a close, but there is still a lot to look forward to in the second half of the year. Apple is expected to release at least 15 more products later this year. Now that the more intelligent and personal version of Siri has finally arrived in beta, a full two years after Apple first previewed it at WWDC 2024, we should begin to see some new ...
Apple Lists 250 Changes Across iOS 27 and More Feature

Apple Shares List of 250 Changes Across iOS 27, macOS Golden Gate, and More

Wednesday June 10, 2026 1:34 pm PDT by
During its WWDC 2026 keynote on Monday, Apple briefly showed a slide with hundreds of new features and enhancements coming across iOS 27, macOS 27 Golden Gate, watchOS 27, tvOS 27, and visionOS 27. All of the software updates are currently available as developer betas, and they are expected to be released to all users in September. We already highlighted some of the key new features from the ...
liquid glass app icon

Apple Maps to Get These 10 New Features in iOS 27

Thursday June 11, 2026 5:45 am PDT by
Apple Maps is getting a range of new features in iOS 27, headlined by an upgraded Flyover experience that uses AI to improve the realism and detail of its aerial imagery. Flyover is a longstanding feature of Apple Maps and lets users explore more than 350 cities in 3D with detailed landmarks, roads, parks, and buildings. Apple described the enhanced Flyover in iOS 27 as combining aerial...

Top Rated Comments

77 months ago
Safari and Webkit
New Features in macOS Big Sur 11 beta 4

* Support for 4K HDR playback of YouTube videos. (64824895)
Score: 23 Votes (Like | Disagree)
77 months ago
With a sad heart I can confirm 4K YouTube works in Safari, gone are the days I could enjoy peoples screams and suffering on the internets, at the lack of 4K YouTube. Guess I need to find a new purpose in life now.
Score: 15 Votes (Like | Disagree)
77 months ago
YES! Finally 4K HDR support in safari. Only took 5 years 😃
Score: 12 Votes (Like | Disagree)
BanjoDudeAhoy Avatar
77 months ago
What I’m really looking forward to is an article that has the word combinations ā€œBig Surā€, ā€œpublic betaā€ and ā€œnow availableā€ in its title.
Ideally in that sequence.
Score: 11 Votes (Like | Disagree)
77 months ago

Safari and Webkit
New Features in macOS Big Sur 11 beta 4

* Support for 4K HDR playback of YouTube videos. (64824895)

OMGOMGOMGOMGOMGOMGOMGOMGOMGOMGOMG
Score: 11 Votes (Like | Disagree)
sniffies Avatar
77 months ago
Are we still all living in Cupertino?
Score: 9 Votes (Like | Disagree)