AWS SAM CLI Fresh install throws error - dyld: Library not loaded: @executable_path/../.Python
Looks like 0.53.0 comes with python3.7 executables, there is a workaround until it is fixed:
brew install --build-from-source aws-sam-cli
https://github.com/awslabs/aws-sam-cli/issues/2101
https://github.com/aws/homebrew-tap/issues/93