Apple Seeds Tenth Beta of macOS Monterey to Developers - MacRumors
Skip to Content

Apple Seeds Tenth Beta of macOS Monterey to Developers

Apple today seeded the tenth developer beta of macOS Monterey, the newest version of the macOS operating system. The tenth beta comes one week after Apple released the ninth macOS Monterey beta.

macOS Monterey on MBP Feature
Registered developers can download the beta through the Apple Developer Center and once the appropriate profile is installed, betas will be available through the Software Update mechanism in System Preferences.

macOS Monterey will bring Universal Control, a feature that lets a single mouse, trackpad, and keyboard be used across multiple Mac or iPad devices, plus there's a new AirPlay to Mac feature. Safari has been redesigned with a new tab bar with a toggle for two different designs and support for Tab Groups, and FaceTime has gained spatial audio, a Portrait Mode on M1 Macs, and Voice Isolation for cutting out background noise. There's also a new SharePlay ‌FaceTime‌ feature that lets Apple users watch TV, listen to music, and share their screens with one another.

Shared With You, a separate feature, keeps track of the music, links, podcasts, news, and photos that people are sent in Messages, highlighting it in the relevant apps. Notes has a new Quick Note feature for jotting down thoughts, and collaboration is easier with mentions and an Activity View.

The Shortcuts app from iOS is now available on the Mac, and Focus helps people stay on task by cutting out background distractions. There's an updated Maps app with a whole slew of new features, and with Live Text, Macs can now detect text in photos or provide details on animals, art, landmarks, plants, and more in images.

Mail Privacy Protection hides IP and prevents tracking through invisible pixels, and iCloud Private Relay keeps Safari browsing protected. There are many other new features in macOS Monterey, with a full rundown available in our macOS Monterey roundup.

Related Forum: macOS Monterey

Popular Stories

macOS 27 next to MacBook Pro Running macOS 27

Apple Announces 'Full Disk Access' Changes on macOS Due to AI Agents

Friday October 2, 2026 12:59 pm PDT by
In a post on its developer news website today, Apple announced that it will be introducing "additional controls" for the "Full Disk Access" setting on macOS due to new risks posed by AI agents. This announcement comes amid the rise of always-on AI agents like Meta's Muse and OpenAI's Dots, which have prompted privacy concerns. "Some developers are using Full Disk Access in ways that could...
iphone duo colors

Apple Shares Photos Shot on iPhone Duo

Thursday October 1, 2026 1:37 pm PDT by
Apple on Instagram today shared a curated gallery of six photos shot on the iPhone Duo. The photos were shot by American photographers Jake Michaels and Jason Nocito, as part of a project commissioned by Apple. iPhone Duo is equipped with four cameras:A rear 48-megapixel Fusion Main camera A rear 48-megapixel Ultra Wide camera A front 12-megapixel Center Stage camera in the outer display A...
iPhone 18 Pro Max ATT

AT&T Acknowledges iPhone 18 Pro Max Issues: Update 'Immediately'

Thursday October 1, 2026 8:42 pm PDT by
In a text message sent to customers today, AT&T acknowledged that some iPhone 18 Pro Max devices on its network are experiencing cellular issues. AT&T said that customers should immediately update to iOS 27.0.1, despite the fact that many affected users have said that the update does not resolve the issues. There are now at least thousands of users that have experienced this problem,...

Top Rated Comments

65 months ago

> Safari has been redesigned with a new tab bar
The only new change in Monterey is a bad one and already available to Big Sur. This seems like the worst update in years. I'll probably be holding until next year's update.
It’s much better and more stabil then big sur
Score: 12 Votes (Like | Disagree)
dogslobber Avatar
65 months ago
Big Sur is now bug free.
Score: 6 Votes (Like | Disagree)
chucker23n1 Avatar
65 months ago

You're right about those Alder Lake Intel I9 CPUs 'smoking' the M1 chip. They will definitely run hot 🥵! Also, M1 is considered lower-end. They should not be compared to Core i9 processors.

M1, maybe. it is the slowest Apple Silicon chip intended for the low end of the Apple line and it seriously challenges current Intel chips. Apple does not intend to stop there. Do you really think that Alder lake will smoke M1x chips? We'll see how that goes once they are both in users hands.
I mean… Intel's own marketing promises a roughly 20% IPC boost for Alder Lake. That would allow it to match the M1, while arriving a year later. It also raises questions such as: at the same wattage, or with more thermal output?

But that's for a single thread.

For multiple threads, we'll probably see:


* Alder Lake-P, at 12-45 W, with 6 p-cores and 8 e-cores. In contrast, the M1X, likely at slightly lower wattage but for the same kind of device (e.g., a 16-inch MacBook Pro), is rumored to feature 8 p-cores and 2 e-cores. Assuming the M1X has the same clock (which I wouldn't be so sure about — don't be surprised to see it go to something like 3.5 or 3.8 GHz, for another 9-19% boost, given that there will be more thermal headroom), that already makes the M1X more powerful at multithreaded stuff — and at least equally as powerful at single-threaded.
* Alder Lake-S, at 65-120W, with 8 p-cores and 8 e-cores, for some reason. Hard to say how this compares to Apple, since they haven't released anything remotely in this area yet.
* Alder Lake-M, at 7-15W, which isn't shipping until early next year but compares most closely to M1. Except, at that point, Apple will probably have the M2, which will bring a 9% boost if the A15 is anything to go by.

I see no reason to believe any of those will "smoke" the M1. They will certainly come a little closer to catching up, but probably with quite a few asterisks attached, like:


* how much more quickly will they throttle, compared to the M1?
* likewise, what is actual wattage compared to claimed TDP?
* when will Intel ship them at scale? This went very poorly for Ice Lake, and still not too great for Tiger Lake. The longer they wait, the more likely the M2 ships first.
* and by the time the M2 has shipped, who cares?

Now, if Intel can pull another 20% next year, that could be interesting. But it isn't looking like that.
Score: 5 Votes (Like | Disagree)
StralyanPithecus Avatar
65 months ago

Wow, this pretty much destroys the only use case for this feature for me. Way to go Apple for not understanding that sometimes one can use two machines signed into different Apple IDs.
Let's given them time to get Universal Control working properly under the same ID, and maybe later they will find a way to enable it for different IDs.
Score: 5 Votes (Like | Disagree)
Chris The Bipolarbear Avatar
65 months ago
Build No is 21A5552a

Attachment Image
Score: 5 Votes (Like | Disagree)
65 months ago

Can I ask what “more stable” actually means? I am generally a novice, and only use whatever is publicly available. In my mind, stable means a full system crash requiring a restart. I’m guessing I get those 1-2 times a year. If that is what you are referencing, how would you be able to test more/less stable in a relatively short period of time. Thanks for your replies.
Stable means what you said. "more stable" in macrumors forum translation means "I have a problem and I'm too lazy to find out why and solve it, so I blame the OS" ;) For me Big Sur is pretty solid and from what I read Monterey will be mostly a refinement.
Score: 5 Votes (Like | Disagree)
Latest Stories
Top Stories: Apple Smart Home Launch on October 13, iPhone Duo Production Issues, and More
Top Stories: Apple Smart Home Launch on October 13, iPhone Duo Production Issues, and More
19 hours ago
Apple Says iPhone 18 Pro Max Users With AT&T Cellular Issue Need to Have Device Replaced
Apple Says iPhone 18 Pro Max Users With AT&T Cellular Issue Need to Have Device Replaced
1 day ago
Apple Announces 'Full Disk Access' Changes on macOS Due to AI Agents
Apple Announces 'Full Disk Access' Changes on macOS Due to AI Agents
2 days ago
AT&T and Apple Just Took Steps Toward Fixing iPhone 18 Pro Max Issue
AT&T and Apple Just Took Steps Toward Fixing iPhone 18 Pro Max Issue
2 days ago
AT&T on iPhone 18 Pro Max Issues: 'We Are Working With Apple'
AT&T on iPhone 18 Pro Max Issues: 'We Are Working With Apple'
2 days ago
Upgrading From an Older Apple Watch? Here's How the New Features Stack Up
Upgrading From an Older Apple Watch? Here's How the New Features Stack Up
2 days ago
Beats 360 Cushion Kits and Apple Accessories See Early Prime Day Price Drops
Beats 360 Cushion Kits and Apple Accessories See Early Prime Day Price Drops
2 days ago
Apple Store in UK Reopening on iPhone Duo Launch Day
Apple Store in UK Reopening on iPhone Duo Launch Day
2 days ago
AT&T Acknowledges iPhone 18 Pro Max Issues: Update 'Immediately'
AT&T Acknowledges iPhone 18 Pro Max Issues: Update 'Immediately'
2 days ago
New 'AirFly Drive' Accessory Turns Wired CarPlay Into Wireless CarPlay
New 'AirFly Drive' Accessory Turns Wired CarPlay Into Wireless CarPlay
2 days ago
Apple Shares Photos Shot on iPhone Duo
Apple Shares Photos Shot on iPhone Duo
3 days ago
Apple Says iPhone Duo Has Replaceable 'Cover Layer'
Apple Says iPhone Duo Has Replaceable 'Cover Layer'
3 days ago
Apple's Smart Home Camera Will Apparently Have 'No Video Recording'
Apple's Smart Home Camera Will Apparently Have 'No Video Recording'
3 days ago
Apple TV Just Updated Its Selection of 'Bonus' Movies
Apple TV Just Updated Its Selection of 'Bonus' Movies
3 days ago
iPhone 18 Pro Colors Buyer's Guide: Which Should You Choose?
iPhone 18 Pro Colors Buyer's Guide: Which Should You Choose?
3 days ago
Early Prime Big Deal Days: Best Discounts on Accessories, TVs, and More at Amazon
Early Prime Big Deal Days: Best Discounts on Accessories, TVs, and More at Amazon
3 days ago
MacBook Pro With OLED Touch Screen Rumored to Launch in October or November
MacBook Pro With OLED Touch Screen Rumored to Launch in October or November
3 days ago
Apple's All-New Home Hub Rumored to Launch in These Four Colors
Apple's All-New Home Hub Rumored to Launch in These Four Colors
3 days ago
iPhone 18 Pro Aperture Control Goes Fully Manual in Halide 3.2
iPhone 18 Pro Aperture Control Goes Fully Manual in Halide 3.2
3 days ago
Apple Stores Receive 'Do Not Open' Boxes Ahead of Smart Home Products Launch
Apple Stores Receive 'Do Not Open' Boxes Ahead of Smart Home Products Launch
3 days ago
iPhone 18 Pro Sales Jump in China Ahead of iPhone Duo Launch
iPhone 18 Pro Sales Jump in China Ahead of iPhone Duo Launch
3 days ago
Apple TV Still Down for Some Users Following Apple Services Outage
Apple TV Still Down for Some Users Following Apple Services Outage
3 days ago
Microsoft 365 Work Accounts May Stop Syncing in Apple Mail
Microsoft 365 Work Accounts May Stop Syncing in Apple Mail
2 days ago
Apple's Smart Home Hub: Everything We Know So Far
Apple's Smart Home Hub: Everything We Know So Far
3 days ago
Apple's Home Hub Borrows From the iPhone Duo's StandBy Mode
Apple's Home Hub Borrows From the iPhone Duo's StandBy Mode
3 days ago
Apple Invites App Updated With Three New Features
Apple Invites App Updated With Three New Features
4 days ago
Apple Event on October 13?
Apple Event on October 13?
4 days ago
Apple Watch SE 3 vs. Series 12 Buyer's Guide: Which Should You Buy?
Apple Watch SE 3 vs. Series 12 Buyer's Guide: Which Should You Buy?
4 days ago
iPad Mini 8 to Offer These 10 New Features
iPad Mini 8 to Offer These 10 New Features
4 days ago
DoorDash Unveils AI Food Ordering Through Apple's Messages App
DoorDash Unveils AI Food Ordering Through Apple's Messages App
4 days ago