e457303049
The docs/installation/mac guide causes a user to download the `ubuntu` image, which defaults to `ubuntu:latest`. After installing the next logical step is to work through the userguide. If the userguide specifies ubuntu:14.04, then a second ubuntu image will be downloaded. On slow internet connections this takes a long time. The cost of specificity in this case seems higher than the value. Since this might be the first or second interaction a user has with docker, they might not realize that they can remove the ":14.04" bit to use the image that was previously downloaded. Signed-off-by: Katrina Owen <katrina.owen@gmail.com> Upstream-commit: 68b07c0af947956581b1c3c1692ab5d8f96af73d Component: engine