Apple Releases Rapid Security Response Updates for iOS 16.5.1 and macOS 13.4.1 to Fix Actively Exploited Vulnerability [Updated]

Apple today released Rapid Security Response (RSR) updates that are available for iPhone and iPad users running the iOS and iPadOS 16.5.1 updates and the macOS Ventura 13.4.1 update.

Rapid Security Response Feature 1
Rapid Security Response updates are designed to provide iOS and macOS users with security fixes without the need to install a full software update. Today's updates address an actively exploited WebKit vulnerability, so it is a good idea to update as soon as possible.

iOS Security Response 16.5.1 is available through the standard Software Update mechanism in the ‌iPhone‌ or ‌iPad‌ Settings app, but is a quick update, requiring just a couple of minutes to download the update and then a quick restart for the install process. The macOS update can be installed through System Settings.

Once the Rapid Security Response update is installed, iOS 16.5.1 users and macOS Ventura 13.4.1 users will see an updated version of the software, and tapping on the version in the About section of Settings will display information about the installed OS version and the Rapid Security Response update. Those who want to disable Rapid Security Response updates on ‌iPhone‌ can do so by following our how to. The updates can also be disabled on the Mac.

Apple has been testing the Rapid Security Response feature since last year, with RSRs first introduced with the launch of iOS 16 and macOS Ventura.

Update: Apple has pulled the RSRs because they caused a bug with Safari.

Popular Stories

iphone 16 pro ghost hand

5 Reasons to Skip This Year's iPhone 17 Pro

Thursday July 10, 2025 4:54 am PDT by
Apple will launch its new iPhone 17 series in two months, 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...
apple tv 4k new orange

New Apple TV Expected Later This Year With These New Features

Saturday July 12, 2025 3:09 pm PDT by
A new Apple TV is expected to be released later this year, and a handful of new features and changes have been rumored for the device. Below, we recap what to expect from the next Apple TV, according to rumors. Rumors Faster Wi-Fi Support The next Apple TV will be equipped with Apple's own combined Wi-Fi and Bluetooth chip, according to Bloomberg's Mark Gurman. He said the chip supports ...
iPhone 17 Pro in Hand Feature Lowgo

iPhone 17 Pro Coming Soon With These 16 New Features

Friday July 11, 2025 12:40 pm PDT by
Apple's next-generation iPhone 17 Pro and iPhone 17 Pro Max are only two months away, and there are plenty of rumors about the devices. Below, we recap key changes rumored for the iPhone 17 Pro models. Latest Rumors These rumors surfaced in June and July:A redesigned Dynamic Island: It has been rumored that all iPhone 17 models will have a redesigned Dynamic Island interface — it might ...
macbook pro blue green

M5 MacBook Pro No Longer Coming in 2025

Thursday July 10, 2025 12:38 pm PDT by
Apple does not plan to refresh any Macs with updated M5 chips in 2025, according to Bloomberg's Mark Gurman. Updated MacBook Air and MacBook Pro models are now planned for the first half of 2026. Gurman previously said that Apple would debut the M5 MacBook Pro models in late 2025, but his newest report suggests that Apple is "considering" pushing them back to 2026. Apple is now said to be...
iphone 16 pro pro max

iPhone 17 Pro Models With BOE Displays Will Be Sold in China Only

Thursday July 10, 2025 11:59 pm PDT by
iPhone 17 Pro and iPhone 17 Pro Max models with displays made by BOE will be sold exclusively in China, according to a new report. Last week, it emerged that Chinese display manufacturer BOE was aggressively ramping up its OLED production capacity for future iPhone models as part of a plan to recapture a major role in Apple's supply chain. Now, tech news aggregator Jukan Choi reports...
Apple Watch Ultra 2 Complications

Apple Watch Ultra 3: What to Expect

Sunday July 13, 2025 10:30 am PDT by
The long wait for an Apple Watch Ultra 3 is nearly over, and a handful of new features and changes have been rumored for the device. Below, we recap what to expect from the Apple Watch Ultra 3:Satellite connectivity for sending and receiving text messages when Wi-Fi and cellular coverage is unavailable 5G support, up from LTE on the Apple Watch Ultra 2 Likely a wide-angle OLED display that ...
apple wallet drivers license feature iPhone 15 pro

Apple Says iPhone Driver's Licenses Will Expand to These 8 U.S. States

Tuesday July 8, 2025 11:26 am PDT by
In select U.S. states, residents can add their driver's license or state ID to the Wallet app on the iPhone and Apple Watch, providing a convenient and contactless way to display proof of identity or age at select airports and businesses, and in select apps. Unfortunately, this feature continues to roll out very slowly since it was announced in 2021, with only nine U.S. states, Puerto Rico,...
iPhone 17 Air Colors Thumb 2

iPhone 17 and iPhone 17 Air Rumored to Come in These 9 Colors

Friday July 11, 2025 12:30 am PDT by
The iPhone 17 and iPhone 17 Air will be available in a total of nine color options, according to new information coming out of Asia. The iPhone 17 Air's expected color options. According to the leaker going by the account name "yeux1122" on the Korean blog Naver, accessory manufacturers are now producing camera protector rings for the iPhone 17 and iPhone 17 Air in colors to match their...

Top Rated Comments

txscott Avatar
26 months ago
Breaking Facebook is one of the best security fixes you can get. As an additional benefit your privacy is also significantly enhanced.
Score: 48 Votes (Like | Disagree)
MiuffinB0y Avatar
26 months ago

This is good, but Apple need to work on a way for RSRs to NOT require a restart if possible. Even better would be automatic background installation with no restart, or a restart scheduled for the middle of the night (e.g., 3 AM). Having to chase people to get them to update their phones is a real drag.
That's not possible as some security updates impact programs that are loaded in memory. A restart makes sure that the system loads the proper version in memory.
Score: 27 Votes (Like | Disagree)
JPack Avatar
26 months ago
Only 2.8MB, talk about compact! Installation took only about 30 seconds plus a restart. This is what it should have been like a long time ago.
Score: 23 Votes (Like | Disagree)
jbachandouris Avatar
26 months ago
And now Facebook is giving me an unsupported browser error. Was working fine before.

Disabled extensions and ran Onyx to clean things out. No change.
Score: 20 Votes (Like | Disagree)
FishyFish Avatar
26 months ago
Yup this breaks Facebook. Maybe that's the security fix?

Also breaks Instagram.

Also breaks Zoom.

Attachment Image

Attachment Image
Score: 19 Votes (Like | Disagree)
clayj Avatar
26 months ago
This is good, but Apple need to work on a way for RSRs to NOT require a restart if possible. Even better would be automatic background installation with no restart, or a restart scheduled for the middle of the night (e.g., 3 AM). Having to chase people to get them to update their phones is a real drag.
Score: 14 Votes (Like | Disagree)