Apple today released a fourth beta of the forthcoming macOS High Sierra 10.13 software update to its registered developers and members of the Apple Developer Program.

The new beta should roll out to public beta testers shortly, likely within the next 24 hours.

macOS High Sierra beta 4 (build number 17A315i) is available as an over-the-air download via the Mac App Store’s Updates tab. You can download the full installer from Apple’s Dev Center portal for developers.

High Sierra introduces new core storage, video and graphics technologies, as well as an enhanced Photos app with a new sidebar, curve-based editing and support for third-party apps like Pixelmator and Photoshop.

Stock apps like FaceTime, Messages and Notes have received a few subtle refinements, too.

Originally released as a developer-only preview at WWDC in June, macOS High Sierra comes with the new Apple File System and packs in support for High Efficiency Video Codec (also known as H.265), an updated version of Metal with support for VR applications and external GPU enclosures, Safari 11 with new anti-tracking features, support for flight status information in Spotlight, more natural voices for Siri and more.

TUTORIAL: How to unenroll from Apple’s Beta Software Program

It’s scheduled to release for public consumption this fall across supported Mac models.

If you spot new user features in macOS High Sierra beta 3, be sure to tell us on Twitter or via email at tips@iDownloadBlog.com. You can also post your findings in the comments section and we’ll update the article with new information as it becomes available.