Install the kubeless CLI via homebrew on OSX.
You can either directly install a software with:
$ brew install kubeless/tap/kubeless
Or add the kubeless tap to your Homebrew installation:
$ brew tap kubeless/tap
$ brew install kubeless
Manually you can download the latest release kubeless CLI:
$ wget https://github.com/kubeless/kubeless/releases/download/0.0.18/kubeless_darwin-amd64.zip
$ shasum -a 256 kubeless_darwin-amd64.zip