macOS Big Sur 11.2 Beta 2 Removes Feature Letting Apple Apps Bypass Third-Party Firewalls and VPNs

macOS Big Sur 11.2 beta 2, which was released yesterday, eliminates a feature that allowed Apple apps bypass third-party firewalls, security tools, and VPN apps, according to reports from ZDNet and security researcher Patrick Wardle.

First Look Big Sur Feature2
macOS Big Sur 11 included a ContentFilterExclusionList that let Apple's apps like the App Store, Maps, iCloud, and more to avoid firewall and VPN apps that users had installed. These apps were not able to filter or inspect traffic for some built-in Apple apps.

Security researchers believed that the feature, found last October, was a major security risk as malware could be designed to latch on to a legitimate Apple app and bypass security software. Users who had VPNs installed also risked exposing their real IP address and location to Apple's apps.


Apple told ZDNet last year that the list was temporary and the result of a series of bugs related to the deprecation of network kernel extensions in macOS Big Sur. Apple has been addressing those bugs, and in the second beta of macOS Big Sur released yesterday, removed the ContentFilterExclusionList from the macOS code.

When macOS Big Sur 11.2 sees a release, Apple apps will be compatible with VPN apps and will no longer be able to bypass firewalls and other security tools.

Related Forum: macOS Big Sur

Popular Stories

iOS 26

15 New Things Your iPhone Can Do in iOS 26.2

Friday December 5, 2025 9:40 am PST by
Apple is about to release iOS 26.2, the second major point update for iPhones since iOS 26 was rolled out in September, and there are at least 15 notable changes and improvements worth checking out. We've rounded them up below. Apple is expected to roll out iOS 26.2 to compatible devices sometime between December 8 and December 16. When the update drops, you can check Apple's servers for the ...
Intel Inside iPhone Feature

Apple's Return to Intel Rumored to Extend to iPhone

Friday December 5, 2025 10:08 am PST by
Intel is expected to begin supplying some Mac and iPad chips in a few years, and the latest rumor claims the partnership might extend to the iPhone. In a research note with investment firm GF Securities this week, obtained by MacRumors, analyst Jeff Pu said he and his colleagues "now expect" Intel to reach a supply deal with Apple for at least some non-pro iPhone chips starting in 2028....
iPhone 14 Pro Dynamic Island

iPhone 18 Pro Leak Adds New Evidence for Under-Display Face ID

Monday December 8, 2025 4:54 am PST by
Apple is actively testing under-screen Face ID for next year's iPhone 18 Pro models using a special "spliced micro-transparent glass" window built into the display, claims a Chinese leaker. According to "Smart Pikachu," a Weibo account that has previously shared accurate supply-chain details on Chinese Android hardware, Apple is testing the special glass as a way to let the TrueDepth...
iOS 26

Apple Seeds Second iOS 26.2 Release Candidate to Developers and Public Beta Testers

Monday December 8, 2025 10:18 am PST by
Apple today seeded the second release candidate version of iOS 26.2 to developers and public beta testers, with the software coming one week after Apple seeded the first RC. The release candidate represents the final version iOS 26.2 that will be provided to the public if no further bugs are found. Registered developers and public beta testers can download the betas from the Settings app on...
iPhone 17 Pro Cosmic Orange

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

Monday December 1, 2025 2:40 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...
Johny Srouji

Apple's Chipmaking Chief Johny Srouji Responds to Report About Him Potentially Leaving

Monday December 8, 2025 9:23 am PST by
Apple's chipmaking chief Johny Srouji has reportedly indicated that he plans to continue working for the company for the foreseeable future. "I love my team, and I love my job at Apple, and I don't plan on leaving anytime soon," said Srouji, in a memo obtained by Bloomberg's Mark Gurman. Here is Srouji's full memo, as shared by Bloomberg:I know you've been reading all kind of rumors and...
Johny Srouji

Apple Chip Chief Johny Srouji Could Be Next to Go as Exodus Continues

Sunday December 7, 2025 10:41 am PST by
Apple's senior vice president of hardware technologies Johny Srouji could be the next leading executive to leave the company amid an alarming exodus of leading employees, Bloomberg's Mark Gurman reports. Srouji apparently recently told CEO Tim Cook that he is "seriously considering leaving" in the near future. He intends to join another company if he departs. Srouji leads Apple's chip design ...
google pixel 10

Switching Between iPhone and Android Will Get Easier With New Apple and Google Collaboration

Monday December 8, 2025 11:10 am PST by
Apple and Google are teaming up to make it easier for users to switch between iPhone and Android smartphones, according to 9to5Google. There is a new Android Canary build available today that simplifies data transfer between two smartphones, and Apple is going to implement the functionality in an upcoming iOS 26 beta. Apple already has a Move to iOS app for transferring data from an Android...
top stories 2025 12 04a

Top Stories: iOS 26.2 Coming Soon, Apple Execs Depart, and More

Saturday December 6, 2025 6:00 am PST by
You'd expect things to be starting to wind down for the holidays by now, but that doesn't seem to be the case yet in the world of Apple news, with Apple just about ready to release iOS 26.2 and other operating system updates to the public. There was also a flurry of news this week about Apple executive departures, some expected and some not so expected, while we also learned that Apple and...
Apple Fitness Plus expansion hero

Apple Fitness+ Coming to 28 New Regions With Digital Voice Dubbing

Monday December 8, 2025 6:19 am PST by
Apple today announced that Fitness+ is expanding to 28 new markets on December 15 in the service's largest international rollout since launch, accompanied by new language dubbing and a K-Pop music genre. Apple Fitness+ will become available in Chile, Hong Kong, India, the Netherlands, Singapore, Taiwan, and additional regions on December 15, with Japan scheduled to follow early next year....

Top Rated Comments

hortod1 Avatar
64 months ago
The older I get the more this might as well be a foreign language

<sigh>
Score: 10 Votes (Like | Disagree)
sideshowuniqueuser Avatar
64 months ago
'We have another candidate for our "Is This A Feature Or Is This A Bug?" bingo.'

Ha ha that cracks me up!
Score: 7 Votes (Like | Disagree)
BWhaler Avatar
64 months ago
It should have always been this way, but I’m pleased Apple is making the appropriately change quickly. Thank you.
Score: 7 Votes (Like | Disagree)
chucker23n1 Avatar
64 months ago

The older I get the more this might as well be a foreign language

<sigh>
Apple recently started requiring third party software who want to control network traffic (such as firewalls) to intercept it a different way. They documented and explained the new way, and it's been mostly fine. However, they then exempted some of their own software from this new way.

A security researcher example: they want to observe how an app communicates with the network, how its behavior changes when they limit some of that communication, etc. They weren't able to do that with some of Apple's apps. For example, if App Store or Find My had a security bug related to network communication, they would have a hard time finding out. Not only can they not control the traffic from those services, they can't even see it.

A more general-purpose example: you're on cellular (or some other metered connection), and use an app like Trip Mode to limit data usage. Well, you can't see the data some of Apple's stuff uses. App Store or Software Update download a large update in the background? Trip Mode won't be able to tell you.

There were probably some reasons Apple did all this in the first place (for example, one might argue that macOS needs to be able to download updates to Xprotect malware definitions no matter what), but there's also a fair bit of hubris involved. It feels like once they did decide to make that exemption list, all kinds of software teams internally signed up to be added, and that's just opening the floodgates for trouble.

Anyway, all this, it appears, is now resolved.
Score: 5 Votes (Like | Disagree)
-BigMac- Avatar
64 months ago
Apple allowed to bypass firewalls/security software?

What an unfortunate “bug” this mustve been for Apple before it was found ;)
Score: 5 Votes (Like | Disagree)
Apple_Robert Avatar
64 months ago

Excellent news - been aching to move to Big Sur (love the place - LOL) but holding back until VPN's would function there (plus other Objective see tools) - wife is itching to do so for work and will do so as soon as the update to 11.2 is out.
SurfShark is the only brand name VPN I have seen with Silicon support thus far. Nord and PIA are dragging their software heels.
Score: 3 Votes (Like | Disagree)