Apple Releases Sixth Beta of macOS Big Sur to Developers [Updated]

Apple today seeded the sixth beta of the upcoming macOS Big Sur update to developers for testing purposes, two weeks after releasing the fifth beta and more than two months after the new update was unveiled at the Worldwide Developers Conference.

macOS dev beta 6 feature 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, Chrome and Firefox Extensions can be ported to Safari, and YouTube supports 4K video playback. 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.

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
For more on everything that's new in macOS Big Sur, make sure to check out our roundup.

Update: Today's macOS Big Sur beta adds support for the new 2020 iMac models.

Related Forum: macOS Big Sur

Popular Stories

iPhone 17 Pro 3 4ths Perspective Aluminum Camera Module 1

New iPhone 17 Pro Details: Brighter Display, Best Battery Life, and More

Wednesday September 3, 2025 5:33 am PDT by
Apple's iPhone 17 Pro and iPhone 17 Pro Max models will feature a number of significant display, thermal, and battery improvements, according to new late-stage rumors. According to the Weibo leaker known as "Instant Digital," the iPhone 17 Pro models will feature displays with higher brightness, making it more suitable for use in direct sunlight for prolonged periods. The iPhone 16 Pro and...
iPhone 17 Pro Iridescent Feature 2

iPhone 17 and iPhone 17 Pro Prices Estimated Ahead of Apple Event Next Week

Tuesday September 2, 2025 1:50 pm PDT by
Just one week before Apple is expected to unveil the iPhone 17 series, an analyst has shared new price estimates for the devices. Here are J.P. Morgan analyst Samik Chatterjee's price estimates for the iPhone 17 series in the United States, according to 9to5Mac: Model Starting Price Model Starting Price Change iPhone 16 $799 iPhone 17 ...
iPhone 17 Pro Iridescent Feature 2

iPhone 17 Pro Clear Case Leak Reveals Three Key Changes

Sunday August 31, 2025 1:26 pm PDT by
Apple is expected to unveil the iPhone 17 series on Tuesday, September 9, and last-minute rumors about the devices continue to surface. The latest info comes from a leaker known as Majin Bu, who has shared alleged images of Apple's Clear Case for the iPhone 17 Pro and Pro Max, or at least replicas. Image Credit: @MajinBuOfficial The images show three alleged changes compared to Apple's iP...
iphone 16 pro ghost hand

iPhone 17 Pro: 5 Reasons Not to Upgrade This Year

Monday September 1, 2025 4:35 am PDT by
Apple will launch its new iPhone 17 series this month, and the iPhone 17 Pro models are expected to get a new design for the rear casing and the camera area. But more significant changes to the lineup are not expected until next year, when the iPhone 18 models arrive. If you're thinking of trading in your iPhone for this year's latest, consider the following features rumored to be coming to...
iPhone 17 Pro Dark Blue and Orange

iPhone 17 Release Date, Pre-Orders, and What to Expect

Thursday August 28, 2025 4:08 am PDT by
An iPhone 17 announcement is a dead cert for September 2025 – Apple has already sent out invites for an "Awe dropping" event on Tuesday, September 9 at the Apple Park campus in Cupertino, California. The timing follows Apple's trend of introducing new iPhone models annually in the fall. At the event, Apple is expected to unveil its new-generation iPhone 17, an all-new ultra-thin iPhone 17...
Apple Watch Ultra 2 Complications

Apple Watch Ultra 3 Coming Next Week: Eight Reasons to Upgrade

Thursday September 4, 2025 7:38 am PDT by
We're only days away from Apple's "Awe dropping" fall event scheduled to take place on Tuesday, September 9 – and along with the new iPhone 17 series, we're going to get a new version of the Apple Watch Ultra for the first time since 2023. By the time the Ultra 3 is unveiled, it will have been two years since the previous model arrived. The intervening period has left plenty of room for...

Top Rated Comments

tkermit Avatar
65 months ago
ugh, they still haven't gotten rid of that stupid hover effect where the background and shadow of a title bar will only appear after mousing over it for a second or two (or scrolling) in apps like Finder, Disk Utility and TextEdit (in plain text mode). The UI has become super busy when moving your cursor over elements in a way that is very reminiscent of Windows. Scott Forstall would have had a word to say about that.



Attachment Image

Attachment Image
Score: 6 Votes (Like | Disagree)
Will Sigmon Avatar
65 months ago
Finally available on my 2020 iMac! Installing soon - will report back.
Score: 6 Votes (Like | Disagree)
gregsapphire Avatar
65 months ago
Hey All!

Just wanted to update you on progress of iMac 2020 install. After a lot of trying I was able to get it installed.

My troubleshooting(not something you have to do but can try:

* I went into Disk Utility and ran first aid on everything I could. Did this in recover mode and from normal app.
* In recover mode and checked that secure boot was turned on
* In finder I searched "macOS" under this Mac. Found and deleted the installer(new installer, but later found Apple pushed a slightly newer version a few hours ago)
* Unenrolled myself from the developer program and re-enrolled after
* Double checked that macOS installer was deleted again
* Ran first aid on disks again to be safe
* Under "Energy Saver" turned Prevent computer from sleeping on and set "Turn display off after" to Never so the display and computer wouldn't go to sleep after starting the process from scratch again.

No you don't have to do all of this but I tried all of this and it ended up working. One thing I noticed was earlier on it would download about 20 to 30% of the download consistently and then it stopped every 10 seconds and then download it again and then stopped again. After I did everything above it consistently downloaded the entire update with no issues and I went through the Installer process. The when the installer was up and running I checked the version of it and it had changed from earlier versioner which made me feel more confident on proceeding for the 4th time.

Hope some of this helps. If you need more assistance let me know. Best of luck!
Score: 6 Votes (Like | Disagree)
sniffies Avatar
65 months ago
Finally!! Beta 5 was getting buggier and buggier by the day.
Score: 5 Votes (Like | Disagree)
macintoshmac Avatar
65 months ago
Build number 20A5364e.
Score: 5 Votes (Like | Disagree)
tywebb13 Avatar
65 months ago

Want to install this on my 2020 iMac, except when I install the profile I get...


"The requested version of macOS is not available." which is fun. That is with the beta utility installed and active.
I think beta 6 is so far only available via delta update. The full installer isn’t available yet. Don’t know if it will be, but I expect that it will be. Maybe just wait a bit longer and see. It is considerably bigger than the delta update, so maybe it is taking apple longer to get it on their servers.
Score: 4 Votes (Like | Disagree)