https://arstechnica.com/gadgets/2018/06/the-end-of-opengl-support-other-updates-apple-didnt-share-at-the-keynote/

SAN JOSE—Monday, thousands of people watched Apple's Worldwide Developers Conference (WWDC) keynote, in which the company described its plans for the next versions of its key operating systems—iOS 12 and macOS Mojave. It was more than two hours long, and it covered a lot of new features and tweaks. But in the hours since the keynote, additional information has emerged that wasn't mentioned in the keynote but is also relevant.

For one thing, Apple held a session at WWDC shortly after the keynote called "Platforms State of the Union" that went into a little more detail on certain features. The company also spoke with press to answer questions and clarify concepts. Finally, the company has released the first beta releases of iOS 12 and macOS Mojave, along with various pieces of support documentation. Developers, press, and users have discovered a number of new changes and features this way.