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All of the rumors are pointing towards Apple having two more events, one on October 13, and one in November. The October 13 is specifically for iPhones and air tags. So I highly doubt that they will release Big Sur at that event.
What’s more likely is:
Event announcement: October 6.
After event: iOS 14.1, watchOS 7.0.2 and tvOS 14.1 all launch with support for iPhone 12.
October 14: Big Sur Beta 10 release.
October 27: Big Sur GM released.
November 4: ARM Mac event announced for either November 10 or November 11. The event invitations go out on Wednesday because Tuesday is Election Day.
November 10/11: Big Sur is released, along side an updated ARM 13.3 inch MBP and an updated Intel 16 inch MBP. iOS 14.2, watchOS 7.1 and tvOS 14.2 are all released as well, and, finally, the HomePod update is released.
So after The November event, all the versions that are currently in beta will be finally released.
At least this is the strategy I would go for. I think they want to launch Big Sur alongside some new macs, and give it another month or so of testing compared to normal, since it’s an entire design change.
Then the rumored super slim 12 inch ARMBook would launch in December with Big Sur 11.0.1
 


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

macOS-dev-beta-9-feature-1.jpg

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.

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

Article Link: Apple Releases Ninth Beta of macOS Big Sur to Developers
Is the full installer available?
 
I use my 16" MBP with an LG external monitor and don't have any "fan" issues with beta 8. Machine is pulling about 13W of power connected to the monitor and is totally silent.

13w means you’re not pushing the machine. Try pushing the full 80-90 watts. Or try pushing the full power of the machine while also having peripherals and eGPU attached, all of which have a demand on the CPU.

A computer with very slim design, very small vents a lot of cores and a GPU to cool will always produce a lot of noise when pushed hard while connected to a very high res external monitor. The only way to remove the heat and prevent meltdown is for the fans to spin hard and be noisy.

The matter becomes more difficult if the GPU drivers aren’t optimal and the pro apps are very power hungry.
 
Your gonna sell your machine because beta software isn’t ready for production machines? Just think how stupid what you said is.

IDK, they have some point. Apple controls the hardware and software - you'd expect them to work together perfectly.

I don't think "beta" excuses it. Mac OS X is over 20 years old - it should be rock steady by now. They shouldn't be having these regressions that take 10+ betas released over the course of 4 months to work out. There's major questions about what on earth Apple's software development practices look like that they produce so many bugs for so few improvements.
 
IDK, they have some point. Apple controls the hardware and software - you'd expect them to work together perfectly.

I don't think "beta" excuses it. Mac OS X is over 20 years old - it should be rock steady by now. They shouldn't be having these regressions that take 10+ betas released over the course of 4 months to work out. There's major questions about what on earth Apple's software development practices look like that they produce so many bugs for so few improvements.
I partly agree. Apple has expertise now and the number of bugs and regressions shouldn't be that high. But underneath changes are in progress since several versions of macOS to make it ready for ARM, no doubt. Considering the big shift in architecture and that both need to be supported, their record is still pretty good. Don't minimize the task. It's an operating system with its foundation and kernel, not a single application.
 
Hoping the AirPods Pro issue is fixed with it only playing through 1 ear. That’s 3 versions I’ve had the issue with and reported several times. On the feedback assistant it says more than 10 similar reports so hopefully it’ll be fixed
 
How to interpret that number?

GM next, or another beta or two?

I have been told the higher the alphabet, the closer to release to public. Beta 8 was 20A5374i but beta 7 20A5374g had a slightly higher order of alphabet.
 
Is the full installer available?

So far only for beta 6.

The older big sur betas have been deleted.

The new beta 9 is not available as a full installer yet and may never be. Betas 7 and 8 weren’t either.

So any attempt to download a full installer, if successful, will just download beta 6, not beta 9.
 
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Got beta 9 installed a little bit ago. Feeling a lot smoother. Spotlight and System Preferences performance are both back to normal. Had an issue getting Messages started, though, and had to reboot, but other than that, smooth sailing thus far.
 
When connecting to an external monitor with the 16inch MBP the power assumption by the video card doubles and fans to increase to very loud levels even when using very little CPU. This is a hardware problem and will not be able to be fixed with with OS or drivers. We returned 15 laptops because of this problem and worked with a variety of departments at Apple.

My friend and I haven’t experienced this. Or at least not to the degree that you have. I’m only plugging into a 19x12 HP display via HDMI using an Anker dock. Not sure about my friend but he has the same baseline model as me.

On moderate use (say 10 Chrome tabs, Word, Excel, Outlook and Dreamweaver and some other small apps), I’m seeing the area above the keyboard hotter than warm but not hot and relatively quiet fans, certainly not annoyingly loud.

Maybe Apple made some fixes mid cycle? Or maybe the guy that applied my thermal paste was competent.

I might post in the ongoing thread but don’t really want to rub it in.
 
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Starting the download. I hope file open dialogues within apps are better and the preferences apps run correctly.
 
In before some dumbass only uses Safari and 1 other application for 1 hour and says the OS stable for every use when it's a bug fest worse than Catalina somehow

Except it’s not worse than Catalina was in my end. Sorry man, oh and I’ve been using all betas since day one
 
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