<p>Trying to start minikube on mac. Virtualization is being provided by VirtualBox.</p>

<pre><code>    $ minikube start
    😄  minikube v1.1.0 on darwin (amd64)
    🔥  Creating virtualbox VM (CPUs=2, Memory=2048MB, Disk=20000MB) ...
    🐳  Configuring environment for Kubernetes v1.14.2 on Docker 18.09.6
    ❌  Unable to load cached images: loading cached images: loading image /Users/paul/.minikube/cache/images/k8s.gcr.io/kube-proxy_v1.14.2: Docker load /tmp/kube-proxy_v1.14.2: command failed: docker load -i /tmp/kube-proxy_v1.14.2
    stdout: 
    stderr: open /var/lib/docker/image/overlay2/layerdb/tmp/write-set-542676317/diff: read-only file system
    : Process exited with status 1

    💣  Failed to setup certs: pre-copy: command failed: sudo rm -f /var/lib/minikube/certs/ca.crt
    stdout: 
    stderr: rm: cannot remove '/var/lib/minikube/certs/ca.crt': Input/output error
    : Process exited with status 1

😿  Sorry that minikube crashed. If this was unexpected, we would love to hear from you:
👉  https://github.com/kubernetes/minikube/issues/new
</code></pre>

<p>Trying <code>minikube delete</code> followed by <code>minikube start</code> produces the same issue. </p>

<p>Docker is running and is signed in. </p>

<p>I also deleted all machines in virtualbox after <code>minikube delete</code> and still get the same result. </p>

<p>According to <a href="https://meta.stackoverflow.com/questions/294791/what-if-i-answer-a-question-in-a-comment">What if I answer a question in a comment?</a> I am adding answer as well since many people dont read comments.</p>

<p>You can try to delete local config in MINIKUBE_HOME before starting minikube</p>

<pre><code>rm -rf ~/.minikube
</code></pre>
