Apple Releases macOS Big Sur 11.3.1 With Fixes for WebKit Security Issues

Alongside iOS 14.5.1 and watchOS 7.4.1, Apple today also released macOS Big Sur 11.3.1, which the company says "provides important security updates".

macOS Big Sur Feature Purple
According to the full security notes for the release, it addresses a memory corruption issue and an integer overflow in WebKit that could both be exploited using maliciously crafted web content. Apple says it aware of a report that these issues may have been actively exploited, so users are advised to upgrade immediately.

Related Forum: macOS Big Sur

Popular Stories

iPhone 17 Slim Feature Single Camera 1 Redux

'iPhone 17 Air' Launching Later This Year With These 10 New Features

Wednesday January 15, 2025 7:16 am PST by
While the so-called "iPhone 17 Air" is not expected to launch until September, there are already plenty of rumors about the "ultra-thin" device. Overall, the "iPhone 17 Air" is shaping up to be a mixed bag. Due to its thinness, the device is expected to have some limited specifications compared to the iPhone 17 Pro models, including only a single rear camera, only a single speaker, no SIM...
2024 iPhone Boxes Feature

Apple Changes Trade-In Values for iPhones, iPads, Macs, and More

Thursday January 16, 2025 6:45 am PST by
Apple today adjusted estimated trade-in values for select iPhone, iPad, Mac, and Apple Watch models in the U.S., according to its website. Some values increased, while others decreased. The changes were not too significant, with most values rising or dropping by $5 to $50. We have outlined some examples below: Device New Value Old Value iPhone 15 Pro Max Up to $630 U ...
new magsafe charger

Apple Releases Updated MagSafe Charger Firmware

Tuesday January 14, 2025 11:30 am PST by
Apple today released new firmware designed for the 25W MagSafe Charger that is compatible with the iPhone 12 and later and the latest AirPods and Apple Watch models. The updated firmware is version 2A143, up from the 2A138 firmware that the accessory shipped with. In the Settings app, you'll see a different version number than the internal firmware number. The 2024 MagSafe charger was...
Generic iOS 18

iOS 18.3 Coming Soon: Here's What's New

Monday January 13, 2025 5:33 am PST by
iOS 18.3 is currently in beta for developers and public beta testers. So far, the upcoming iPhone software update is very minor in scope. Below, we outline what is new in iOS 18.3 so far. The only potential new feature coming to iPhones with iOS 18.3 so far is robot vacuum support in the Home app, but this functionality is not yet live. Apple is laying the groundwork for the feature,...
iPhone 17 Pro Dual Tone Feature 1

iPhone 17 Pro Launching Later This Year With These 8 New Features

Thursday January 9, 2025 5:45 am PST by
While the iPhone 17 Pro and iPhone 17 Pro Max are not expected to launch until September, there are already plenty of rumors about the devices. iPhone 17 Pro concept based on rumors Below, we recap key changes rumored for the iPhone 17 Pro models as of January 2025: More aluminum: iPhone 17 Pro models are rumored to have an aluminum frame, whereas the iPhone 15 Pro and iPhone 16 Pro models ...
Generic iOS 18

Everything New in iOS 18.3 Beta 3

Thursday January 16, 2025 12:39 pm PST by
Apple provided the third beta of iOS 18.3 to developers today, and while the betas have so far been light on new features, the third beta makes some major changes to Notification Summaries and also tweaks a few other features. Notification Summary Changes Apple made multiple changes to Notification Summaries in response to complaints about inaccurate summaries of news headlines. For...
severance new york promo 1

Apple Promotes Severance Season 2 Premiere With Lumon Industries Pop-Up and Visits From Actors

Tuesday January 14, 2025 3:47 pm PST by
Ahead of the season two premiere of hit TV show Severance, Apple is marketing the show with a fun Severance pop-up at the Grand Central Terminal in New York City. Apple has assembled a glass cube with workstations that are identical to the setups that Lumon employees use on the show, complete with employees "working," doing yoga, playing catch, throwing paper airplanes, sipping coffee, and...
airpods pro 2 gradient

AirPods Pro 3 Expected This Year: Here's What We Know

Wednesday January 8, 2025 7:05 am PST by
Despite being released over two years ago, Apple's AirPods Pro 2 continue to dominate the wireless earbud market. However, with the AirPods Pro 3 expected to launch sometime in 2025, anyone thinking of buying Apple's premium earbuds may be wondering if the next generation is worth holding out for. Apart from their audio and noise-canceling performance, which are generally regarded as...
Apple Card iPhone 16 Pro Feature

Three Companies Are Now in the Running to Take Over the Apple Card

Thursday January 16, 2025 8:18 am PST by
Apple is in talks with Barclays and Synchrony about becoming its new financial partner for the Apple Card, according to Reuters sources. The report today added that Apple has also been holding discussions with Chase Bank owner JPMorgan since last year, so there are at least three potential companies in the running to take over the Apple Card from current partner Goldman Sachs. Goldman...

Top Rated Comments

Anthony Sullivan Avatar
49 months ago
Do these small point updates really need to be gigabytes in size, take 50+ minutes to install (even on my Macs with SSDs), and push the OS build number? It's like installing a whole new version of macOS each time. Seems inefficient and likely to contribute to SSD wear.
Score: 16 Votes (Like | Disagree)
sirozha Avatar
49 months ago
3.30 GB for me on the M1 MacBook Air. Really Apple? 3.3 GB for a Webkit bug?
Score: 12 Votes (Like | Disagree)
GigabitEthernet Avatar
49 months ago
Will they ever fix AirPods audio switching? It is still broken
Score: 10 Votes (Like | Disagree)
doboy Avatar
49 months ago
Apple, shape up! Every recent updates have been followed up by .1 release about a week later. And more often then not, it’s due to something Apple screwed up and not security related.
Score: 8 Votes (Like | Disagree)
Jerry Fritschle Avatar
49 months ago

3.30 GB for me on the M1 MacBook Air. Really Apple? 3.3 GB for a Webkit bug?
Any changes to the Sealed System Volume appear to constrain the minimum size of a delta update.
Score: 5 Votes (Like | Disagree)
Populus Avatar
49 months ago
Don’t get me wrong, I’m glad Apple addressed a security flaw with a new update, but as others said on the iOS 14.5.1 post, didn’t Apple discover this over the two months of the beta? I made a clean install hoping 11.3 would last a while... I could have waited a week before making this clean install
Score: 5 Votes (Like | Disagree)