I already voted. I cannot play 1.14 at all on my MacBook Pro running Sierra. When creating a new world, or when opening an existing one, I get the "libobjc" error that everyone else is seeing.
I have also tried the latest Oracle Java, and also the built-in, and both crash the same way.
Mojang please help!
I can re-create the same as David above - 19w09a works, 19w11a crashes on creating a new world, or opening an existing world.
MacBook Pro (Retina, 15-inch, Late 2013)
Running Sierra - 10.12.6