
Currently make-ca-cert.sh uses (equiv of) mktemp -d --tmpdir kube.XXXXX but --tmpdir is not a valid option on OS X. Switch to mktemp -d -t kube.XXXXX Which is valid, but subtly different between OS X and Linux. The directory you get back will be different on each. Linux: ${tmpdir}/kube.y5Bsu/ OS X: ${tmpdir}/kube.XXXXX.VQ81oOui/