Apple is rolling out the second macOS Sierra beta ahead of the upcoming major update for the Cupertino giant's latest Mac operating system. The new beta with build code 16B2333a is said to come with performance improvements, among others. 

According to MacRumors, Apple is seeding macOS Sierra 10.12.1 beta to developers starting this Tuesday. The release of the new beta comes just six days since the first beta was rolled out and exactly a week after the official new Mac OS was released to the public. 

Though the release note of the new macOS Sierra beta has yet to be available, MacRumors reports the developer beta comes with under-the-hood performance improvements, bug fixes and other implementations to address the issues identified with the first beta. 

The first beta came with Photos support for the Portrait feature of the iPhone 7 Plus dual-lens camera system that was introduced in the iOS 10.1 beta. 

Just like the first beta with build code 16B2327e, the second macOS Sierra beta is expected to be rolled out to public beta testing program members in the coming days. 

Apple’s latest operating system for its Mac devices is said to offer a lot of new useful features to users. The Independent reports the natural landmark-inspired OS adds Siri to Mac devices, making it easy for users to send Messages and emails, perform quick searches and ask about time via voice command. 

The new OS also comes with Apple Watch integration, so users can remotely unlock their Mac devices using the Auto Unlock feature on their smart timepiece. However, the Independent explains this feature is only available to watchOS 3-running wearables and more recent Macs. 

Another useful feature that macOS Sierra brings to Mac devices is deeper iCloud integration. This pertains to how users can retrieve files they saved in the Documents folder of a specific device using any of their other supported devices. 

Other features that are part of the macOS Sierra update include Safari-based Apple Pay, Picture-in-picture mode, the Universal Clipboard, storage optimization and many more, as per Gizmodo.