All Products: Why Does the macOS Hostname Automatically Change?

Products

• Carbon Black App Control (formerly Cb Protection)

Issue/Introduction

Why does the hostname reported change automatically on macOS?

Environment

• All Products
• macOS: All Supported Versions

Resolution

By default the macOS is configured to use a dynamic global hostname that changes based on the IP Address. This can be managed in several ways, more details can be found here.

Additional Information

• In some instances Dynamic Global Hostname can cause the App Control Agent to show as a Duplicate Computer.
• The following macOS command could be scripted to change the hostname:

  sudo scutil --set HostName LT2002.local