In addition to iOS 9, there are many more Apple WWDC 2015 previews

Apple's 2015 Worldwide Developers Conference (WWDC) will open at the Yerba Buena Center for the Arts in San Francisco on June 8. American technology blog 9to5mac gave a preview of Apple's WWDC 2015 on Wednesday, predicting that Apple will launch its latest streaming music service and release iOS 9 at the conference.

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Apple is expected to launch its latest streaming music service and release iOS 9 at this conference.

iOS 9, Mac OS X 10.11 and hardware

It is unlikely that Apple will launch Mac and iOS related hardware at this conference, as the company has already launched new MacBook laptops and upgraded iMacs. However, Apple is likely to launch a new version of Mac OS X 10.11, and if the company continues the trend of previous years, the new system will further improve the interaction with iOS. Mac OS X 10.11 is said to focus on stability, which is exactly what the current Yosemite system lacks.

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Apple's iOS system will also be upgraded to iOS 9, focusing on fixing vulnerabilities, system optimization and stability

Apple's iOS system will also be upgraded to iOS 9, focusing on bug fixes, system optimization and stability. The iOS 9 upgrade is likely to focus on the iPad, providing split-screen mode and other new features, making the Apple tablet more like a laptop replacement rather than just a consumer device.

Beats/Apple Music

It's clear that Apple is ready to launch its Beats streaming product. The next-generation Apple TV is said to not be launched at this conference, but the set-top box will still be unveiled as a core device for the smart home platform HomeKit and more applications.

Integrating Apple Music into iTunes on Mac and iOS/Watch apps will be a key differentiator

Beats/Apple Music will make some headlines as it will not only bring exclusive content but also collaborations with well-known DJs. Apple Music will likely cost $9.99 per month, with the first month free. For Apple, integrating Apple Music into iTunes on the Mac and iOS/Watch apps will be a key differentiating move.

Apple Watch system updates

Apple Watch uses a customized version of iOS, which is also expected to receive a major upgrade at the conference, allowing developers to directly access information from multiple sensors built into the watch. Some sensors may not yet reach their full potential based on how they are used now. Apple is also said to be developing new "smart leashing" tools, such as Find My Watch, improving heart rate monitoring, and adding personalized watch faces. In addition, Apple may also fix issues with the initial setup and user interface of the Apple Watch.

Apple Watch system updates

Photo Services

Google has launched a photo service with the largest storage space, and Apple Photos needs to respond. Apple doesn't necessarily need to copy Google's approach, but they need to improve the service, or lower the price of the service, or at least provide users with a few reasons to choose Apple Photos instead of Google.

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Apple Photos needs to respond

Currently, Yahoo provides 1TB of free photo storage, while Google and Amazon provide the maximum storage. In comparison, Apple iCloud's 5GB storage space seems very small. If Apple can increase the free storage space of its photo service, some users who are considering switching to Google's photo service may stick to the Apple platform.