Boot Camp Assistant User Guide


You must use Boot Camp Assistant to remove Windows, or a partition that was created with Boot Camp Assistant, from your Intel-based Mac.

Here's how to do a fresh installation of macOS if you aren't already running Catalina or Big Sur. Connect your boot drive. Start up - or restart - your Mac while holding down the Option key (also. DosDude Catalina Patcher is a popular third-party tool that allows users to patch the MacOS Catalina installer on otherwise unsupported Macs. Of course, just because you can do this, doesn't mean.

WARNING: Do not use any other utilities to remove Windows or a partition that was created with Boot Camp.

  1. Start up your Mac in macOS.

  2. Back up all important data stored on your Windows partition before you remove Windows.

    WARNING: When Windows is removed, the Windows partition—as well as all data stored in the partition—will be erased permanently.

  3. Quit all open apps and log out any other users.

  4. Open Boot Camp Assistant , then click Continue.

  5. If the Select Tasks step appears, select “Remove Windows 10 or later version,” then click Continue.

  6. Do one of the following:

    • If your Mac has a single internal disk, click Restore.

    • If your Mac has multiple internal disks, select the Windows disk, select “Restore disk to a single macOS partition,” then click Continue.

See alsoGet started with Boot Camp on MacTroubleshoot Boot Camp Assistant problems on Mac

1. Introduction

Catalina Boot

Spring Boot is a convention over configuration framework that allows us to set up a production-ready setup of a Spring project, and Tomcat is one of the most popular Java Servlet Containers.

By default, Spring Boot builds a standalone Java application that can run as a desktop application or be configured as a system service, but there are environments where we can't install a new service or run the application manually.

Opposite to standalone applications, Tomcat is installed as a service that can manage multiple applications within the same application process, avoiding the need for a specific setup for each application.

In this guide, we're going to create a simple Spring Boot application and adapt it to work within Tomcat.


2. Setting up a Spring Boot Application

We're going to setup a simple Spring Boot web application using one of the available starter templates:

There's no need for additional configurations beyond the standard @SpringBootApplication since Spring Boot takes care of the default setup.

We add a simple REST EndPoint to return some valid content for us:

Now let's execute the application with mvn spring-boot:run and start a browser at http://localhost:8080/hello to check the results.

3. Creating a Spring Boot WAR

Servlet containers expect the applications to meet some contracts to be deployed. For Tomcat the contract is the Servlet API 3.0.

To have our application meeting this contract, we have to perform some small modifications in the source code.

First, we need to package a WAR application instead of a JAR. For this, we change pom.xml with the following content:

Now, let's modify the final WAR file name to avoid including version numbers:

Then, we're going to add the Tomcat dependency:

Finally, we initialize the Servlet context required by Tomcat by implementing the SpringBootServletInitializer interface:

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Catalina Boot Disc

To build our Tomcat-deployable WAR application, we execute the mvn clean package. After that, our WAR file is generated at target/spring-boot-tomcat.war (assuming the Maven artifactId is “spring-boot-tomcat”).

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We should consider that this new setup makes our Spring Boot application a non-standalone application (if you would like to have it working in standalone mode again, remove the provided scope from the tomcat dependency).

4. Deploying the WAR to Tomcat

Catalina Bootable Download

To have our WAR file deployed and running in Tomcat, we need to complete the following steps:

  1. Download Apache Tomcat and unpackage it into a tomcat folder
  2. Copy our WAR file from target/spring-boot-tomcat.war to the tomcat/webapps/ folder
  3. From a terminal navigate to tomcat/bin folder and execute
    1. catalina.bat run (on Windows)
    2. run (on Unix-based systems)
  4. Go to http://localhost:8080/spring-boot-tomcat/hello

Catalina Bootable Usb

This has been a quick Tomcat setup, please check the guide on Tomcat Installation for a complete setup guide. There are also additional ways of deploying a WAR file to Tomcat.

Catalina Boots

5. Conclusion

In this short guide, we created a simple Spring Boot application and turned it into a valid WAR application deployable on a Tomcat server.

As always, the full source code of the examples is available over on GitHub.

Get started with Spring 5 and Spring Boot 2, through the Learn Spring course:

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