Apple has released Mojave 10.14 Beta 3 and Developer Beta 4 in the last couple of days. I run them both. The new Mojave OS seems to be coming along fine. I cannot tell any obvious changes in the Mojave features in these Betas, most of it is under the hood. Well, I should say the Developer Beta 4 does now support the new MacBook Pro models. Mojave remains pretty snappy. I am looking forward to the September release.