Free up some space or select another install location for your app. Then try to install the app again. How to free up space. For macOS, see How to free up storage space on your Mac. For Windows, see Free up drive space in Windows 10. How to change the install location for your app.
macOS Recovery makes it easy to reinstall the Mac operating system, even if you need to erase your startup disk first. All you need is a connection to the Internet. If a wireless network is available, you can choose it from the Wi-Fi menu , which is also available in macOS Recovery.
To start up from macOS Recovery, turn on your Mac and immediately press and hold one of the following sets of keys on your keyboard. Release the keys when you see an Apple logo, spinning globe, or other startup screen.
Reinstall the latest macOS that was installed on your Mac (recommended).
Upgrade to the latest macOS that is compatible with your Mac.
Reinstall the macOS that came with your Mac, or the closest version still available.
You might be prompted to enter a password, such as a firmware password or the password of a user who is an administrator of this Mac. Enter the requested password to continue.
When you see the utilities window, you have started up from macOS Recovery.
You probably don't need to erase, unless you're selling, trading in, or giving away your Mac, or you have an issue that requires you to erase. If you need to erase before installing macOS, select Disk Utility from the Utilities window, then click Continue. Learn more about when and how to erase.
When you're ready to reinstall macOS, choose Reinstall macOS from the Utilities window. Then click Continue and follow the onscreen instructions. You will be asked to choose a disk on which to install.
Please allow installation to complete without putting your Mac to sleep or closing its lid. During installation, your Mac might restart and show a progress bar several times, and the screen might be empty for minutes at a time.
If your Mac restarts to a setup assistant, but you're selling, trading in, or giving away your Mac, press Command-Q to quit the assistant without completing setup. Then click Shut Down. When the new owner starts up the Mac, they can use their own information to complete setup.
The version of macOS offered by macOS Recovery might vary in some cases:
If you can't get macOS Recovery to offer the installer you want, you might be able to use one of the other ways to install macOS.
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Welcome! We are excited that you want to learn Docker.
This page contains step-by-step instructions on how to get started with Docker. We also recommend the video walkthrough from Dockercon 2020.
The Docker Quickstart training module teaches you how to:
Set up your Docker environment (on this page)
Docker is a platform for developers and sysadmins to build, run, and shareapplications with containers. The use of containers to deploy applicationsis called containerization. Containers are not new, but their use for easilydeploying applications is.
Containerization is increasingly popular because containers are:
Fundamentally, a container is nothing but a running process,with some added encapsulation features applied to it in order to keep it isolated from the host and from other containers.One of the most important aspects of container isolation is that each container interacts with its own private filesystem; this filesystem is provided by a Docker image.An image includes everything needed to run an application - the code or binary,runtimes, dependencies, and any other filesystem objects required.
A container runs natively on Linux and shares the kernel of the hostmachine with other containers. It runs a discrete process, taking no more memorythan any other executable, making it lightweight.
By contrast, a virtual machine (VM) runs a full-blown “guest” operatingsystem with virtual access to host resources through a hypervisor. In general,VMs incur a lot of overhead beyond what is being consumed by your application logic.
Docker Desktop is an easy-to-install application for your Mac or Windows environment that enables you to start coding and containerizing in minutes. Docker Desktop includes everything you need to build, run, and share containerized applications right from your machine.
Follow the instructions appropriate for your operating system to download and install Docker Desktop.
After you’ve successfully installed Docker Desktop, open a terminal and run
docker --version to check the version of Docker installed on your machine.
Test that your installation works by running the hello-world Docker image:
docker image ls to list the
hello-world image that you downloaded to your machine.
hello-world container (spawned by the image) which exits after displaying its message. If it is still running, you do not need the
At this point, you’ve installed Docker Desktop on your development machine, and ran a quick test to ensure you are set up to build and run your first containerized application.
For information on how to build and run your first containerized application using Node.js, go to Build your Node.js image.
Refer to the following topics for further documentation on all CLI commands used in this article:get started, setup, orientation, quickstart, intro, concepts, containers, docker desktop