curl (3) URL using bad/illegal format or missing URL
Try this:
curl -L -o minikube "https://storage.googleapis.com/minikube/releases/v0.18.0/minikube-darwin-amd64" && chmod +x minikube && sudo mv ./minikube /usr/local/bin/See if it's working.
Try this:
curl -L -o minikube "https://storage.googleapis.com/minikube/releases/v0.18.0/minikube-darwin-amd64" && chmod +x minikube && sudo mv ./minikube /usr/local/bin/See if it's working.