Docker app not starting as non-admin user on mac

Docker Desktop for Mac
1

Expected behavior

Docker runs fine after first launching as administrator account then subsequently launching as non-administrator account.

Actual behavior

Installs and runs OK as administrator account. When launched by non-administrator, hangs at “Docker starting…”. docker client is unable to talk to the engine:

Information

OS X: 10.11.5 (15F34)

Version 1.12.0-rc2-beta16 (build: 9493)
f615be9fb245904fbdf1aa0cad251d418c869428

Steps to reproduce the behavior

  1. Download the docker installer and install into /Applications
  2. Log in as administrator and start docker
  3. Log in as non-administrator and try to start docker