MacOS Mojave build 18B75

macOS Mojave build 18B75 is a post-RTM build of macOS Mojave. This build introduced the ability to use Group FaceTime, which was initially intended to be included in the RTM build but had been delayed due to bugs in the program.

The xnu build string for 18B75 is Darwin Kernel Version 18.2.0: Fri Oct 5 19:41:49 PDT 2018; root:xnu-4903.221.2~2/RELEASE_X86_64