It's "all systems glow" for Apple's Worldwide Developers Conference, the company's annual developer conference. WWDC returns on June 8, and anticipation is building as Apple unveils the WWDC 2026 tagline, a curated Apple Music playlist, computer wallpapers and more.

The all systems glow tagline, revealed in an Apple Developer blog, is a play on the phrase "all systems go" and may allude to the release of iOS 27 and its rumored new features. Recent leaks suggest Apple's next mobile OS could introduce a dedicated Siri app and chatbot, complete with a built-in dark mode and glowing UI elements. The new tagline may suggest that the UI leaks are accurate.

Apple's previous tagline for WWDC 2026 was "coming bright up," also alluding to lighting elements. 

It seems Apple is also hoping to capture a poppy, upswing vibe for its upcoming developer conference, if the musical teaser posted by the company's senior vice president of marketing, Greg Joswiak, is any indication. For the first time, Apple has also released an official Apple Music playlist for WWDC. It features 20 contemporary songs from artists like the resurgent pop star Zara Larsson and K-pop supergroup BTS. You can find the full playlist here.

There's also a new wallpaper featuring WWDC 2026 key art, which you can download from Apple's "glow all out" developer blog here. The black-and-chrome image is (predictably) appropriately sized for use as a background on Macs, iPads and iPhones.

In addition to iOS 27, Apple may launch updated versions of its operating systems for other products, including Macs, iPads, Apple Watches and Apple Vision Pro headsets.

It's unlikely that Apple will reveal any massive hardware announcements at WWDC, since the company recently unveiled the budget MacBook Neo, the iPhone 17E and new M5 MacBook models. Even if the rumored foldable iPhone is nearly ready, it's safe to assume that Apple will reveal it during the company's September event.

The 2026 Worldwide Developers Conference is likely to be a landmark moment for Apple -- and not just because of the software updates the company is prepping. The keynote speech may be the final talk given by CEO Tim Cook, who is passing the baton to Apple's current senior vice president of software engineering, John Ternus, at the beginning of September.

None of the leaks or predictions about WWDC 2026 is confirmed. An Apple representative did not immediately respond to a request for comment.