If you need to install AWS SAM CLI on a Mac, then the easiest option is to use Homebrew with the following commands:

brew tap aws/tap
brew install aws-sam-cli

Now you can validate the installation as follows:

sam --version

SAM CLI is essential if you’re building serverless applications on AWS — it lets you build, test, and deploy Lambda functions locally before pushing to the cloud. The brew tap step adds the AWS Homebrew repository, which keeps the SAM CLI updated separately from the main Homebrew packages.

If you don’t use Homebrew, AWS also provides a standalone installer package you can download from their docs. To update SAM CLI later, just run brew upgrade aws-sam-cli. Make sure you also have Docker installed if you want to use sam local invoke for local Lambda testing.