How to Install macOS Big Sur Using a Flash Drive

Are you struggling to install macOS Big Sur using your flash drive? If so, this article will guide you through the process of installing the operating system manually.

Before we begin, it's essential to note that this method requires some technical expertise and may not be suitable for all users. Additionally, make sure you have backed up your data before proceeding with the installation process.

To start, run the following command in Terminal to change to the `/Volumes/Untitled/private/tmp/Install macOS Big Sur.app` directory:

```

cd private/tmp/Install\ macOS\ Big\ Sur.app

```

Next, copy the `Install macOS Big Sur.app` application from macOS Recovery to the `/Volumes/Untitled/private/tmp` directory using the following command:

```

cp -R '/Install macOS Big Sur.app' private/tmp

```

Create a directory named `private` on your flash drive and add a sub-directory inside it called `tmp`. You can do this by running the following commands:

```

mkdir /Volumes/Untitled/private/tmp

```

Once you have created the directory structure, change to the `/Volumes/Untitled/` directory using the following command:

```

cd /Volumes/Untitled/

```

Now, copy the complete command that begins with `curl` and scroll down to the 'Or use Terminal to reinstall' section of the KBase article.

After erasing your Mac's startup drive, open Safari and navigate to the URL specified in the article. You will need to use this drive name for the examples shown in this post.

To install macOS Big Sur using the methods described above, follow these steps:

1. Using the Install macOS app: Use the `Install macOS Big Sur` app to install the operating system.

2. Using the curl tool: Download the necessary installer files onto your flash drive using the `curl` command.

3. Copying the Install macOS app manually: Copy the `Install macOS Big Sur.app` application available in macOS Recovery into the proper location on your flash drive.

4. Creating the directory structure manually: Create the proper directory structure manually on your flash drive.

5. Wiping the drive: Wipe the drive that you intend to install macOS Big Sur onto.

This method is referenced in the Apple KBase article, 'For more details, please see below the jump.'

If you are using a Mac with an Apple Silicon processor and only have one Mac available, there's another option. You can use DFU mode and Apple Configurator on your Mac to create a USB installer. However, if this is not possible, there's another way.

What to Do When Everything Fails

Every so often, you may find yourself in a situation where you need to reinstall macOS Big Sur and everything is failing on you. If you've tried all the usual methods and are still having trouble, don't worry - there's hope.

In this article, we'll explore some alternative methods for installing macOS Big Sur using a flash drive. We'll cover topics such as building a USB installer, installing from macOS Recovery, and more. Whether you're struggling with a Mac that won't boot or need to reinstall the operating system for another reason, this guide is here to help.

Installing macOS Big Sur using a flash drive can be a bit of a challenge, but with these steps, you should be able to successfully install the operating system on your Mac. Remember to back up your data before proceeding and take your time when following each step. If you encounter any issues along the way, don't hesitate to reach out for help.

Install big sur flash drive