Amazon EC2 Mac实例补丁管道是一种自动化流程，可用于定期升级、安装和测试Amazon EC2 Mac实例的操作系统、应用程序和其他组件的最新修补程序。以下是使用AWS Systems Manager Automation文档的示例。

{
    "schemaVersion": "1.2",
    "description": "Patch for Amazon EC2 Mac instances",
    "parameters": {
        "AutomationAssumeRole": {
            "type": "String",
            "description": "The ARN of the role that allows Automation to perform the actions on the resources."
        },
        "PatchGroup": {
            "type": "String",
            "description": "The name of the patch group where the instances are assigned.",
            "default": "MacInstances"
        }
    },
    "mainSteps": [
        {
            "name": "AgentCheck",
            "action": "aws:runCommand",
            "description": "Check if SSM Agent is installed",
            "precondition": {
                "StringEquals": [
                    "platformType",
                    "MacOS"
                ]
            },
            "inputs": {
                "DocumentName": "AWS-RunShellScript",
                "InstanceIds": "{{ InstanceId }}",
                "Comment": "{{ AutomationDocumentName }}",
                "Parameters": {
                    "commands": [
                        "/usr/bin/test -f /usr/local/amazon/bin/amazon-cloudwatch-agent || echo SSM_AGENT_NOT_FOUND",
                        "[[ -z `pgrep -f amazon-cloudwatch-agent` ]] || echo CLOUDWATCH_AGENT_FOUND_RUNNING",
                        "sg=$(dscl . -read /Groups/admin GroupMembership 2>/dev/null | awk '{print $2}')",
                        "[[ -n $(dscl . -read /Groups/$sg GroupMembership 2>/dev/null | grep 'root') ]] || echo NOT_IN_ADMIN_GROUP"
                    ]
                },
                "CloudWatchOutputConfig": {
                    "CloudWatchLogGroupName": "{{ AutomationExecutionId }}",
                    "CloudWatchOutputEnabled": true
                },
                "MaxConcurrency": "50",
                "MaxErrors": "0"
            },
            "nextStep": "InstallSSMAgent",