We will be ending support for macOS 10.10 Yosemite beginning with the Carbon Black Cloud macOS 3.4.4 maintenance release planned for this fall.
We recommend that customers running Yosemite consider upgrading those endpoints to a newer operating system to maintain compatibility with future versions of the Carbon Black Cloud sensor.
You can view the macOS support matrix here: https://community.carbonblack.com/t5/Documentation-Downloads/Carbon-Black-Cloud-sensor-macOS-support...
If you have any questions, please reach out to support or your account team.