Apple Releases Second Rapid Security Response Updates for iOS 16.4 and macOS 13.3 Ventura Beta Users - MacRumorsOpen MenuShow RoundupsShow Forums menuVisit ForumsOpen Sidebar
Skip to Content

Apple Releases Second Rapid Security Response Updates for iOS 16.4 and macOS 13.3 Ventura Beta Users

Apple today released a Rapid Security Response update that is available for those running the iOS 16.4 beta, marking the launch of the fourth RSR update since the feature was introduced in iOS 16.

rapid security response b
The Rapid Security Response Update is designed to provide iOS 16.4 beta users with bug fixes without the need to install a full update, and this is likely a test update given the small file size.

iOS Security Response 16.4 (b) is available through the standard Software Update mechanism in the 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.

Once the Rapid Security Response update is installed, iOS 16.4 users will see an updated version of iOS 16.4 (b), and tapping on the version in the About section of Settings will display information about the installed iOS version and the Rapid Security Response update. Those who want to disable Rapid Security Response updates can do so by following our how to.

Update: Apple has also released a second rapid security response update for macOS 13.3 Ventura beta users.

Popular Stories

iPhone 18 Pro Deep Red Feature

iPhone 18 Pro Launching Later This Year With These 12 New Features

Wednesday March 18, 2026 7:39 am PDT by
While the iPhone 18 Pro and iPhone 18 Pro Max are not expected to launch for another six months or so, there are already plenty of rumors about the devices. It was initially reported that the iPhone 18 Pro models would have fully under-screen Face ID, with only a front camera visible in the top-left corner of the screen. However, the latest rumors indicate that only one Face ID component...
imac video apple feature

Apple Released Yet Another New Product Today

Friday March 20, 2026 2:39 pm PDT by
Apple has unveiled a whopping nine new products so far this March, including an iPhone 17e, iPad Air models with the M4 chip, MacBook Air models with the M5 chip, MacBook Pro models with M5 Pro and M5 Max chips, the all-new MacBook Neo, an updated Studio Display, a higher-end Studio Display XDR, AirPods Max 2, and now the Nike Powerbeats Pro 2. iPhone 17e features the same overall design as...
ios 26 4 yellow

Here Are Apple's Release Notes for iOS 26.4

Wednesday March 18, 2026 11:56 am PDT by
Apple provided developers and public beta testers with the release candidate versions of iOS 26.4 and iPadOS 26.4, which means we're going to see a public launch as soon as next week. The RC versions of the software include Apple's official release notes, giving us final details on what's included in the update. Apple Music - Playlist Playground (beta) generates a playlist from your...

Top Rated Comments

40 months ago

3.8mb for me, hopefully this fixes my battery.
This fixes nothing. It is meant to test the update mechanism itself.
Score: 8 Votes (Like | Disagree)
Realityck Avatar
40 months ago
The second RSR was a repeat of the exact same test of a new updating method. Slightly modify Safari and then revert it back the same as MacOS 13.3 beta 2. They had to do this before coming out with a beta 3 which is expected in a day or two.

MacOS 13.3 beta 2 (b)

* [B]Version 16.4 (18615.1.24)[/B]
* System Firmware Version: 8422.100.640.505.1 (M1 based Macs)
* Darwin Kernel Version 22.4.0: Wed Feb 22 22:16:19 PST 2023; root:xnu-8796.100.763.505.1~1/RELEASE_ARM64_T8103 arm64

MacOS 13.3 beta 2 (a)

* Safari Version 16.4 (18615.1.24.110.1)
* System Firmware Version: 8422.100.640.505.1 (M1 based Macs)
* Darwin Kernel Version 22.4.0: Wed Feb 22 22:16:19 PST 2023; root:xnu-8796.100.763.505.1~1/RELEASE_ARM64_T8103 arm64

MacOS 13.3 beta 2

* Safari Version 16.4 (18615.1.24)
* System Firmware Version: 8422.100.640.505.1 (M1 based Macs)
* Darwin Kernel Version 22.4.0: Wed Feb 22 22:16:19 PST 2023; root:xnu-8796.100.763.505.1~1/RELEASE_ARM64_T8103 arm64
Score: 5 Votes (Like | Disagree)
40 months ago
I wish there was a way to apply these quick updates without a restart. I suppose it’s not feasible to update the OS while it’s running, unless it’s a very specific component that isn’t needed all the time to make the OS function.
Score: 3 Votes (Like | Disagree)
redbeard331 Avatar
40 months ago
3.8mb for me, hopefully this fixes my battery.
Score: 3 Votes (Like | Disagree)
sbailey4 Avatar
40 months ago

This fixes nothing. It is meant to test the update mechanism itself.
Wait, Are you saying that potential issue of less battery life is not a security issue and won't be addressed in a security update?!?! I mean surely Apple can see how lower battery life could be a security risk for folks in the woods or desert with no power, no battery packs, no cars, etc available. :)
Score: 1 Votes (Like | Disagree)
PsykX Avatar
40 months ago
I wonder why this makes the news. They're probably just testing the mechanism again in the Beta channel.
Score: 1 Votes (Like | Disagree)
Related Apple News: Macbook Pro M5 Pro M5 Max | Apple Tv Deals | Mac | Iphone | Make Homepod Alert You To Smoke Alarms