Apple Seeds First Beta of macOS Big Sur to Developers for Testing Purposes

Apple today introduced the newest version of macOS, the operating system that runs on the Mac. macOS 11.0 Big Sur is now available in a beta capacity for registered developers who want to test out the new features.

f1592849341
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. As with all of the new betas, Apple recommends not installing macOS Big Sur on a primary machine because it is early release software and could have major bugs.

macOS Big Sur is a major update that introduces a refined design for the macOS operating system. It's iOS like, but immediately familiar to Mac users with small tweaks to window design, color palette, app icons, and more.

Control Center is now available for the Mac, offering up quick access to controls right from the desktop, and the updated Notification Center includes interactive notifications and redesigned widgets that mirror the widgets on iOS.

Safari has major new features that include a customizable start page, built-in translation, and a Privacy Report that lets you know what trackers each webpage us using. There's a new Mac App Store category for extensions, and tools for devs to bring extensions created for other browsers to Safari.

The Messages app for Mac is now based on the Messages app on iOS with support for all of the new features like pinned conversations, @ mentions, inline replies for group messages, and more. Messages effects and Memoji Stickers are now available for the Mac, as are Memoji customization options.

Maps has also been overhauled in macOS Big Sur with Guides, Look Around, indoor maps, and more, plus support for cycling routes and electric vehicles.

macOS Big Sur is only available to registered developers at this time, but later in the summer, Apple will make a public version of the macOS Big Sur beta available to give public beta testers a chance to try the software before it sees a public launch this fall.

Related Forum: macOS Big Sur

Popular Stories

iOS 26

Everything New in iOS 26.2 Beta 3

Monday November 17, 2025 3:20 pm PST by
Apple provided developers with the third beta of an upcoming iOS 26.2 update, and there are still new features that are being added with each beta that we get. We've rounded up all of the changes that Apple made in beta 3. AirDrop Apple added new AirDrop functionality, providing a way for two people to share files temporarily without having to add one another as contacts. iOS 26.2...
applecare apple care banner

Apple Brings New AppleCare+ Options to India

Tuesday November 18, 2025 8:42 am PST by
Apple today announced an expansion of AppleCare+ coverage in India, with new options for monthly and annual plans, and the addition of Theft and Loss for iPhone for the first time. Options for monthly and annual AppleCare+ plans in India provide more choice and flexibility, allowing users to keep coverage for as long as they require. Apple's vice president of Worldwide iPhone Product...
iPhone 17 Pro Cosmic Orange

10 Reasons to Wait for Next Year's iPhone 18 Pro

Wednesday November 19, 2025 4:00 am PST by
Apple's iPhone development roadmap runs several years into the future and the company is continually working with suppliers on several successive iPhone models at the same time, which is why we often get rumored features months ahead of launch. The iPhone 18 series is no different, and we already have a good idea of what to expect for the iPhone 18 Pro and iPhone 18 Pro Max. One thing worth...
Apple Wallet ID Illinois

iPhone Driver's License Feature Launching in Illinois

Tuesday November 18, 2025 8:47 am PST by
In select U.S. states, residents can add their driver's license or state ID to the Wallet app on the iPhone and Apple Watch, providing a convenient and contactless way to display proof of identity or age at select airports and businesses, and in select apps. Starting this Wednesday, November 19, the feature will be available to residents of Illinois. The announcement confirmed that the...
iPhone 17 Pro and Air N1 Feature

iPhone 17 vs. iPhone 16 Wi-Fi Speeds: New Study Reveals the Winner

Tuesday November 18, 2025 10:53 am PST by
A new study has revealed that the iPhone 17, iPhone 17 Pro, iPhone 17 Pro Max, and iPhone Air achieve significantly faster average Wi-Fi speeds compared to the iPhone 16 series, thanks to Apple's custom-designed N1 chip. The study was conducted by Ookla, the company behind the popular Speedtest website and app. It said the results are based on global, crowdsourced Speedtest user data...
macbook black friday

The Best Early Black Friday Mac Deals

Tuesday November 18, 2025 7:32 am PST by
We're getting closer to Black Friday, which lands next week on Friday, November 28. In the lead-up to the shopping holiday, we're tracking a few lowest-ever prices on Apple's most popular Macs, including the M4 MacBook Air and brand new M5 MacBook Pro. Note: MacRumors is an affiliate partner with some of these vendors. When you click a link and make a purchase, we may receive a small payment,...
Magic Keyboard Touch ID Feature

Apple Releases New Firmware for 140W USB-C Power Adapter, Magic Keyboard and Magic Trackpad

Tuesday November 18, 2025 1:05 pm PST by
Apple today released updated firmware for several accessories, including the 140W USB-C Power Adapter, the Magic Trackpad 2, the Magic Trackpad USB-C, the Magic Keyboard with Touch ID, and the Magic Keyboard with Touch ID and Numeric Keypad. There is no word on what's included in the updated firmware at this time, but it could offer performance improvements and security updates. Accessory...
Apple Sports App Preview Feature

Apple Sports App on iPhone Now Available in More European Countries

Monday November 17, 2025 6:27 am PST by
The free Apple Sports app on the iPhone was released in additional European countries today, including Belgium, Croatia, Czechia, the Netherlands, Luxembourg, Poland, Hungary, Denmark, Finland, Norway, Sweden, Switzerland, Slovakia, Slovenia, Serbia, Greece, Estonia, Latvia, Romania, Ukraine, and others. The app was already available in the U.S., the U.K., Canada, Austria, France, Germany,...
best early black friday deals

Best Black Friday Apple Deals Live Now - Save on AirPods, iPads, and Apple Watches

Saturday November 15, 2025 1:45 pm PST by
We're officially in the month of Black Friday, which will take place on Friday, November 28 in 2025. As always, this will be the best time of the year to shop for great deals, including popular Apple products like AirPods, iPad, Apple Watch, and more. In this article, the majority of the discounts will be found on Amazon. Note: MacRumors is an affiliate partner with some of these vendors. When ...
ipad mini 7 feature red and blue

iPad Mini 8: Four Major New Features to Expect

Wednesday November 19, 2025 7:50 am PST by
Apple's eighth-generation iPad mini is highly likely to arrive next year, offering a significant refresh of the device with at least four major new features. OLED Display The next-generation version of the iPad mini could feature an OLED display, as part of Apple's plan to expand the display technology across many more of its devices. Apple's first OLED device was the Apple Watch in 2015, ...

Top Rated Comments

Lazy Avatar
71 months ago
Looks like a nice upgrade. I’ll be skipping Catalina entirely and moving straight from Mojave to Big Sur.
Score: 16 Votes (Like | Disagree)
FlyGuyDEN Avatar
71 months ago
Did anyone else notice the boot chime when they announced Big Sur? Will someone let us know if they're put it back in? I have it re-enabled on my 16" MBP running Catalina.
Score: 9 Votes (Like | Disagree)
tywebb13 Avatar
71 months ago
Once you download it you can make a bootable USB (at least 16GB, named initially as Untitled) with this command:

sudo /Applications/Install\ macOS\ Beta.app/Contents/Resources/createinstallmedia --volume /Volumes/Untitled

It is likely this command will change in beta 2 when it may include the name Big Sur.

Normally Beta 1's are nameless and go with a number. This time the command doesn't have a number either.

Could be 11.0 but more likely 10.16 so far. It might change to 11 in beta 2
Score: 7 Votes (Like | Disagree)
talmy Avatar
71 months ago
Note this marks the end of OS X. We've now gone to 11.

Unless you've got one of the developers ARM systems, there's nothing to see here but cosmetic changes and revised apps, and those app revisions really could have been done without a new OS.
Score: 7 Votes (Like | Disagree)
meme1255 Avatar
71 months ago

Is this a typo?
I don't think so, Catalina still behaves like alpha...
Score: 7 Votes (Like | Disagree)
MisterAndrew Avatar
71 months ago

Wow, you must be one of the very first. Well done. Show a picture in 'Day' mode as well? Are you using it on your primary machine or a secondary one?
My primary machine, but I have it installed on its own drive. I'm going to avoid signing into iCloud on it since it's just for testing right now.



Attachment Image

Attachment Image
Score: 6 Votes (Like | Disagree)