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page_title: Installation on Mac OS X
page_description: Instructions for installing Docker on OS X using boot2docker.
page_keywords: Docker, Docker documentation, requirements, boot2docker, VirtualBox, SSH, Linux, OSX, OS X, Mac
# Installing Docker on Mac OS X
> **Note:**
> Docker is supported on Mac OS X 10.6 "Snow Leopard" or newer.
The Docker Engine uses Linux-specific kernel features, so to run it on OS X
we need to use a lightweight virtual machine (vm). You use the OS X Docker client to
control the virtualized Docker Engine to build, run, and manage Docker containers.
To make this process easier, we've designed a helper application called
[Boot2Docker](https://github.com/boot2docker/boot2docker) that installs the
virtual machine and runs the Docker daemon.
## Demonstration
<iframe width="640" height="360" src="//www.youtube.com/embed/wQsrKX4588U?rel=0" frameborder="0" allowfullscreen></iframe>
## Installation
1. Download the latest release of the [Docker for OSX Installer](
https://github.com/boot2docker/osx-installer/releases)
2. Run the installer, which will install VirtualBox and the Boot2Docker management
tool.
3. Run the `Boot2Docker` app in the `Applications` folder:
Or, to initiate Boot2Docker manually, open a terminal and run:
$ boot2docker init
$ boot2docker start
$ export DOCKER_HOST=tcp://$(boot2docker ip 2>/dev/null):2375
The `boot2docker init` command will ask you to enter an SSH key passphrase - the simplest
(but least secure) is to just hit [Enter]. This passphrase is used by the
`boot2docker ssh` command.
Once you have an initialized virtual machine, you can control it with `boot2docker stop`
and `boot2docker start`.
## Upgrading
1. Download the latest release of the [Docker for OSX Installer](
https://github.com/boot2docker/osx-installer/releases)
2. Run the installer, which will update VirtualBox and the Boot2Docker management
tool.
3. To upgrade your existing virtual machine, open a terminal and run:
$ boot2docker stop
$ boot2docker download
$ boot2docker start
## Running Docker
From your terminal, you can test that Docker is running with a “hello world” example.
Start the vm and then run:
$ docker run ubuntu echo hello world
This should download the `ubuntu` image and print `hello world`.
## Container port redirection
The latest version of `boot2docker` sets up a host only network adaptor which provides
access to the container's ports.
If you run a container with an exposed port,
$ docker run --rm -i -t -p 80:80 nginx
then you should be able to access that Nginx server using the IP address reported by:
$ boot2docker ssh ip addr show dev eth1
Typically, it is 192.168.59.103, but it could get changed by Virtualbox's DHCP
implementation.
# Further details
If you are curious, the username for the boot2docker default user is `docker` and the password is `tcuser`.
The Boot2Docker management tool provides several commands:
$ ./boot2docker
Usage: ./boot2docker [<options>]
{help|init|up|ssh|save|down|poweroff|reset|restart|config|status|info|delete|download|version}
Continue with the [User Guide](/userguide/).
For further information or to report issues, please visit the [Boot2Docker site](http://boot2docker.io).
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