macOS Sequoia 15.4 RC now available for testing

Apple has released the release candidate (RC) for macOS Sequoia 15.4. This update is part of a new batch of software releases and is available for both developers and the public. The biggest feature in this update is a significant upgrade to Apple Mail. Other improvements include new emoji, the ability to use Macs for Quick Start when setting up new devices, and the expansion of language options for Apple Intelligence. As this RC version approaches the public launch, it is focused on fixing bugs and improving performance. Users should expect a smoother experience with their Macs after installing the RC. However, there may not be noticeable new features at this stage. Apple plans to release macOS 15.4 along with iOS 18.4 soon, likely next week. If any new features are discovered in this update, further information will be shared.