Uninstall SSM Agent from macOS instances
macOS doesn't natively support uninstallation of PKG
files.
To uninstall AWS Systems Manager Agent (SSM Agent) from an Amazon Elastic Compute Cloud (Amazon EC2) instance for
macOS, you can use the AWS managed script from the following location.
https://github.com/aws/amazon-ssm-agent/blob/mainline/Tools/src/update/darwin/uninstall.sh