As announced on April 14, the 2015 version of WWDC will take place June
8–12 at the conference's usual home at Moscone West in San Francisco. The conference will begin with a keynote on the first day, June 8, where Apple will make its major announcements and set the stage for the remainder of the week.

Ahead of the event's kickoff, Apple has begun decorating Moscone West with signs and banners. As of Friday, the company has put up interior banners and added Apple logos to the exterior windows. Work on decorations may continue throughout the weekend.


For the last several years, Apple has featured new versions of iOS and OS X at the conference. This year's conference will be similar, with Apple introducing OS X 10.11 and iOS 9. There are also rumors suggesting Apple will be debuting a new streaming music service and a revamped version of iTunes Radio. We may also get new details on HomeKit and Apple Pay, including a new rewards program for the payments service.
 

Ahead of WWDC, rumors indicated Apple would also introduce a new Apple TV set-top box and a new subscription television service at the event, but those plans have been shelved as Apple's TV products are not yet ready to be unveiled.

Apple typically previews new versions of OS X and iOS at its Worldwide Developers Conference, in order to give developers time to get accustomed to updates ahead of their typical fall release dates. In 2015, Apple is expected to debut both OS X 10.11 and iOS 9.

iOS 9

iOS 9's major addition may be a new lifestyle management feature called "Proactive." According to rumors, Proactive replaces iOS's existing Spotlight Search with a richer set of search features and a new user interface that displays content from various apps, Contacts, and Maps, to help iOS users navigate through their daily activities.
Proactive might, for example, display an upcoming calendar appointment or a flight email at the relevant time. It's able to learn from a user's daily habits, so someone who checks their email right after waking up might have an email app displayed on the Proactive screen for quick access at the appropriate time.
iOS 9 may also feature some Maps improvements, including the addition of transit directions, a new "Browse Around Me" Points of Interest system, and an augmented reality view.
iOS 9 is said to include tools for Force Touch, suggesting next-generation iOS devices will support the feature, and it may also have some important security improvements. A revamped keyboard experience may be in the works, and we may also see the introduction of split-screen multitasking and a new system wide San Francisco font.

OS X 10.11

Like iOS 9, OS X 10.11 may focus on introducing new security features, bug fixes, and stability improvements for Apple's Mac-based operating system.
Apple is rumored to be working on a new kernel-level security system called "Rootless," which will help curb malware by preventing access to protected system files. Apple may also convert many IMAP-based applications like Notes, Reminders, and Calendars to its iCloud Drive system to improve communication between the apps and increase security.
As far as consumer-facing features go, OS X 10.11 may gain a new Control Center that will include music controls and other features similar to the Control Center on iOS, like access to Do Not Disturb, Wi-Fi, and Bluetooth. OS X 10.11 may also include a new systemwide San Francisco font, which is the font Apple first designed for the Apple Watch.

Native Apple Watch Apps

For the time being, Apple Watch apps are limited to running on a paired iPhone, projecting extensions for the Apple Watch to the wrist-worn device to allow users to access them. The arrangement sometimes results in delays as apps are loaded from the phone, and apps are currently limited in how they can interact with the watch hardware, but that will change at WWDC when developers are provided with updated tools that will allow them to build apps that will run natively on the Apple Watch itself. Developers will also have greater access to watch hardware, including the various sensors and the Digital Crown. After developers have some time to build apps with the new tools, native apps will launch to users later this year.

New Streaming Music Service

According to rumors, Apple will debut its revamped streaming music service at WWDC. Said to be a rebranding of its existing Beats Music service, the new service will likely be built into iTunes and the iOS Music app. Early rumors suggested it could be priced at $7.99, below the industry standard, but now it looks like it'll be $9.99 like other competing services.
Apple is still working on completing deals for the new music service, but it is on track for an introduction at WWDC. The service may debut at WWDC and launch a few weeks later in late June in several different countries.

Revamped iTunes Radio

Along with a new streaming music service, Apple is also rumored to be planning to introduce a revamped version of iTunes Radio. iTunes Radio is designed to complement the new music service, giving people a way to listen to music for free. It may include more local content and new stations that are created by and hosted by DJs.

Apple Pay

Apple may make some Apple Pay-related announcements at WWDC, perhaps introducing a new rewards program for the payments service. Details are scarce on the program, but it's said to offer "perks" to those who use Apple Pay to make purchases in stores and apps. It's also possible Apple will announce an upcoming expansion of Apple Pay to additional countries, beginning with Canada. Recent rumors have suggested Apple Pay will be launching in Canada in November.

HomeKit

Apple may share additional details on HomeKit, its home automation platform. First introduced at WWDC 2014, HomeKit is a platform that allows various connected devices like thermostats, locks, and more, to interface with iOS devices. Many companies announced the launch of the first HomeKit-compatible devices on June 2, just a week ahead of WWDC. A HomeKit app for controlling compatible devices called "Home" may be introduced as part of iOS 9.

For many years, WWDC tickets were available to any registered developers willing to purchase them, but as Apple's popularity has grown and the size of the conference has remained relatively the same due to space and staffing constraints, tickets have been much harder to come by. WWDC sold out for the first time in 2008, and by 2013 tickets for the event were selling out in just two minutes. For 2014, Apple moved to a lottery system, and the company is once again using that system in 2015.
Tickets for the 2015 conference were available for $1,599, the same price Apple has charged for many years, with Apple also offering 350 conference scholarships to student developers and members/alumni of certain STEM organizations through an application process.
Lottery winners were selected on Friday, April 17 and developers began receiving order confirmations on that date.

2014

At last year's WWDC, Apple unveiled:

- Apple Announces OS X Yosemite with Improved Cross-Device Connectivity and New User Interface
- Apple Announces iOS 8 with Interactive Notifications, QuickType, More
- Apple Announces 'iCloud Drive' and 'Mail Drop' Features for OS X Yosemite
- Apple Updates iMessage with Improved Group Messaging and Video and Audio Messages
- 'QuickType' Keyboard for iOS 8 Offers Context-Aware Predicitive Typing Suggestions
- iOS 8 to Include Support for System Wide Third-Party Keyboards
- Apple to Enhance App Store with 'Explore' Tab, App Bundles, Beta Testing, and More
- Apple to Discontinue Support for iPhone 4 in iOS 8
- Apple Announces Significant SDK Improvements with New 'Swift' Programming Language, CloudKit and More

2013

At 2013's WWDC, Apple unveiled iOS 7, OS X Mavericks, iWork for iCloud, the Mac Pro, and new MacBook Airs.

2012

2012's event saw the introduction of the MacBook Pro with Retina Display, iOS 6 and its standalone Maps app, OS X Mountain Lion, MacBook Pro and MacBook Air updates, and a redesigned AirPort Express.