While the next major version of macOS likely won’t be announced until the WWDC 2017 opening keynote on June 5, eagle-eyed blogger Pike’s Universum has discovered what appears to be Apple’s first public sign of macOS 10.13.
Specifically, the blog shared a portion of the App Store URL, otherwise known as a CatalogURL, for macOS 10.13. We were subsequently able to pinpoint the full URL by tweaking an older CatalogURL link, and it appears to be a secure HTTPS link originating from Apple’s servers, so the screenshot is legitimate.
The full URL: https://swscan.apple.com/content/catalogs/others/index-10.13seed.merged-1.sucatalog.gz
We don’t know much about what’s coming in macOS 10.13 at this point, but visits we’re receiving from Macs running pre-release versions of macOS 10.13 have been picking up steadily since the beginning of the year, presumably as Apple’s engineers work on the operating system update ahead of its unveiling.