UPDATE (May 15): 10.14.5 is ready to go!
[ See Reply by Chi-Hu Park for details: viewtopic.php?f=55&t=7407#p48049 ]
Isn't 10.14.5 supposed to introduce some significant shifts towards OS X 10.15 (going by various YouTube reports)?
Anyhow, Here's a link to Apple's new 10.14.5 page I came across:
Mobo: Asus Prime B350-Plus
Video: MSI GeForce 8600 GT (its Fine for 2D apps ... my GTX 580 is not supported, so had to be removed)