Was having the exact same issue with OS X: version 10.11.4 (build: 15E65) & Docker.app: version v1.11.1-beta13.1. Factory reset also resolved it for me.
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Was having the exact same issue with OS X: version 10.11.4 (build: 15E65) & Docker.app: version v1.11.1-beta13.1. Factory reset also resolved it for me.