Apple has released updates to both iOS and macOS Mojave to fix the highly publicized Group FaceTime eavesdropping bug. Both iOS 12.1.4 and and update to macOS Mojave 10.14.3 brings a fix to the bug and both are available now to download to your devices.
Once you have installed the updates on your devices, the Group FaceTime will be available for you to use. Note that you will only be able to use the feature if you have 12.1.4 installed on your iPhone or iPad and 10.14.3 installed on your Mac. Older version will not work.
The eavesdropping bug in Group FaceTime was discovered late last month and Apple acknowledged the bug publicly. Indeed, the Cupertino tech giant went as far as to disable the Group FaceTime servers to prevent the bug from being exploited. That didn’t stop lawsuits however from being filed against Apple.
As far as release notes go, they are pretty generic. For both iOS 12.1.4 and macOS 10.14.3, they list “important security updates” are in the releases and that it is recommended for all users. While it is possible that there are other fixes in these releases, the main emphasis is on the FaceTime bug. This is particularly true for iOS where version 12.2 is now in its second beta and the primary focus of the Apple dev team.
Finally, remember to re-enable FaceTime on your devices if you disabled them per this article.