Just a couple of days to go before the Worldwide Developers Congress (WWDC) 2017, countless reports have surfaced, suggesting what to expect from Apple's much-awaited annual event in San Jose, California. In the software department, there is so much Apple is speculated to unveil at this year's event. Here is a breakdown of things Apple users can expect from iOS 11, macOS 10.13, and watchOS 4.

iOS 11

While there is so little information about what is coming up for iOS 11, rumours are firm that Apple will spill some details about iPhone's next mobile operating system update. A major user interface makeover is expected to come along with it and this will be the first time Apple implements a system-wide design change since iOS 7.

Some of the tweaks expected are intended to suit up Siri. After it acquired a couple of AI and machine learning start-ups, MacRumors suspects that Apple might be looking into expanding Siri's capabilities. These tweaks include the integration of additional types of third-party apps, support for group FaceTime conversations, and a revamped Music app which could correlate to Carpool Karaoke, Apple's first Music TV show.

Meanwhile, more iOS 11 features might be revealed not later than September when the iPhone 8 goes out in public. And these features might consist of facial recognition, augmented reality, and 3D sensing.

macOS 10.13

The design could be a major change waiting for the next version of macOS, too. Similar to iOS 11, there could be changes in macOS 10.13 to support Siri improvements on Apple's PCs. Additional cross-software changes between iOS and macOS might also be executed to support integrations between mobile and PC devices of Apple.

While the official name of macOS 10.13 remains a mystery, speculations arise that the firm will move on with its traditional California landmark naming scheme. Monikers that ring a bell so far are Mammoth, Miramar, Mojave, and Monterey.

watchOS 4

As for watchOS 4, information provided through rumours has been sparse for now aside from the suspected design changes that will be applied to iOS 11.

WWDC 2017 kicks off Monday, 5 June and ends Friday, 9 June.