Apple on Thursday updated macOS Mojave with the release of the macOS 10.14.3 Supplemental Update. The update was released in conjunction with the iOS 12.1.4 update.
The Supplemental Update fixes the Group FaceTime bug that has been making headlines lately. While most people associate the bug with the iPhone, Group FaceTime support is available on macOS Mojave. The update also fixes a security problem involving Live Photos in FaceTime. The security notes for the Supplemental Update are available online.