Install specific version of kubectl
curl -LO https://storage.googleapis.com/kubernetes-release/release/<specific-kubectl-version>/bin/darwin/amd64/kubectl
For your case if you want to install version v1.11.3 then replace specific-kubectl-version with v1.11.3
Then make this binary executable
chmod +x ./kubectl
Then move this binary to your PATH
sudo mv ./kubectl $(which kubectl)