Version 2.79b of Blender won't open in on my Mac. Which one should I be useing for 10.14.6 Mojave?
As of today (July 11, 2019), 10.14.6 is a beta OS version. Blender 2.79b runs fine on my iMac with 10.14.5. If you are a beta tester for 10.14.6, I would recommend submitting a bug report both to Apple and to the Blender team.