Here's what's new in the Release Candidate versions of iOS 16.4, iPadOS 16.4, watchOS 9.4, macOS Ventura 13.3, tvOS 16.4

iOS 16
(Image credit: iMore)

Apple continues to ready itself for a new round of software updates and has now made the first Release Candidate (RC) version available for developers to download.

That means that iOS 16.4, iPadOS 16.4, macOS Ventura 13.3, watchOS 9.4, and tvOS 16.4 are all now closer to a big release than ever, assuming no major issues are found in this latest release.

There aren't normally all that many changes in a release candidate update, but that doesn't mean that there are none at all.

Let's dive in.

iOS 16.4 Voice Isolation

Apple iPhone 14 Pro incoming call

(Image credit: Apple)

Apple has added Voice Isolation to cellular calls when enabled, with this RC update adding the feature for the first time.

Voice Isolation removes as much background noise as possible while also boosting the mic input in an attempt to make it easier for people to hear what's being said on calls. You won't need the best iPhone ever to make it work, either. Any iPhone compatible with iOS 16 should be good to go.

Photos duplicate detection in iCloud Shared Photo Library

Organizing photos on iPhone and iPad

(Image credit: iMore)

Apple added duplicate photo and video detection in iOS 16, but this iOS 16.4 update will add support for checking for duplicates in iCloud Shared Photo Library too.

In use, duplicate detection will display what it considers to be duplicate photos and videos in a new "Duplicates" section where people can check and take action as required.

Changes in previous betas

While the iOS 16.4 update isn't a massive one, there are some tweaks that have one into it. The same can be said for some of the other updates, too.

One of the main changes is to the way iOS and iPadOS betas will be handled, with Apple set to remove the need for developer beta profiles while preventing people from installing the beta if they aren't actually registered with Apple.

Apple is also removing NFC support from its Car Keys feature, leaving Ultra Wideband technology as the only way for people to lock unlock, and start their cars in the future.

Moving on, Apple is adding more than 20 new emoji to this release and Apple's devices will once again benefit from a new HomeKit architecture that was previously launched and then pulled as a part of iOS 16.2.

Specific to the Apple Watch, Apple says that it's worked on preventing wake-up alarms from being silenced by accident, while the AFib History feature is rolling out to additional countries.

Apple TV owners will of course have tvOS 16.4 to download, but changes are few and far between and Apple normally doesn't make a big deal of these updates. Expect the tvOS 16.4 to include global improvements like the Home app architecture mentioned above, though. It's a similar story for macOS Ventura also, with emojis also getting an outing there.

Other improvements include new VoiceOver support for maps in the Weather app, push notifications for web apps that have been added to the Home Screen, and more. A fix for Matter-compatible thermostats that would sometimes become unresponsive in the Home app has also been rolled out.

Owners of the iPhone 14 and iPhone 14 Pro models can also expect Crash Detection optimizations designed to prevent the feature from calling for help when it isn't needed.

It still isn't clear when Apple will release the new updates, but the arrival of these RC versions suggests that a public release won't be too far away.

Oliver Haslam

Oliver Haslam has written about Apple and the wider technology business for more than a decade with bylines on How-To Geek, PC Mag, iDownloadBlog, and many more. He has also been published in print for Macworld, including cover stories. At iMore, Oliver is involved in daily news coverage and, not being short of opinions, has been known to 'explain' those thoughts in more detail, too.

Having grown up using PCs and spending far too much money on graphics card and flashy RAM, Oliver switched to the Mac with a G5 iMac and hasn't looked back. Since then he's seen the growth of the smartphone world, backed by iPhone, and new product categories come and go. Current expertise includes iOS, macOS, streaming services, and pretty much anything that has a battery or plugs into a wall. Oliver also covers mobile gaming for iMore, with Apple Arcade a particular focus. He's been gaming since the Atari 2600 days and still struggles to comprehend the fact he can play console quality titles on his pocket computer.