How to Create a Bootable Disc for Mac
Is your Mac running slow or displaying error messages? It might be time to perform a clean installation of macOS. But how can you do that without an installation disc? The answer is simple: create a bootable disc for your Mac. In this article, we will guide you through the easy steps to create a bootable disc for your Mac, so you can reinstall macOS and bring your Mac back to its optimal performance.
Step 1: Prepare a USB Drive
The first step to create a bootable disc is to prepare a USB drive. Make sure your USB drive has at least 16GB of storage space and is formatted as Mac OS Extended (Journaled). If you have any important data on the drive, make sure to back it up before proceeding.
Tip: You can use Disk Utility, which is a built-in Mac application, to format your USB drive and set it up as a bootable disc.
Step 2: Download macOS
Next, you will need to download the macOS installation file from the App Store. Open the App Store on your Mac, search for the latest version of macOS, and click “Download” to start the download process. Once the download is complete, the installation file will be saved in the Applications folder.
Tip: Make sure you have a stable internet connection to ensure a smooth download process.
Step 3: Create the Bootable Disc
Now it’s time to create the bootable disc. To do this, open Terminal, which can be found in the Utilities folder within the Applications folder, or by searching for it using Spotlight. In Terminal, type the command “sudo /Applications/Install\ macOS\ [version].app/Contents/Resources/createinstallmedia –volume /Volumes/USB” and press Enter. Replace “[version]” with the name of the macOS version you downloaded in Step 2, and “USB” with the name of your USB drive.
Tip: Make sure to double-check the names to avoid any mistakes.
Step 4: Confirm the Action
After you press Enter, Terminal will prompt you to confirm the action. Type “Y” and press Enter to proceed. Terminal will begin creating the bootable disc, which may take some time. Once the process is complete, you will see a message confirming the successful creation of the bootable disc.
Tip: It’s important to be patient and not interrupt the process, as this may cause errors.
With the bootable disc created, you are now ready to reinstall macOS on your Mac. Simply restart your Mac, press and hold the Option key while it is booting up, and select the USB drive as the startup disk. Follow the on-screen prompts to complete the installation process. By following these easy steps, you can create a bootable disc for your Mac and get it back to its optimal performance in no time.
Preparing the Disc
Before creating a bootable disc for your Mac, you need to make sure you have the necessary materials and that you are using a compatible disc. Here are the steps you can follow to prepare the disc:
Gather the Materials
First, you will need a blank DVD or a USB flash drive with enough storage space to hold the installation files. Make sure the disc or drive is in good condition and doesn’t have any scratches or damage that could prevent it from being recognized by your Mac.
Download the Installation File
Next, you’ll need to download the macOS installation file from the App Store or from the Apple Developer website. Make sure you choose the correct version of macOS that you want to install on your Mac. The file can be quite large, so make sure you have a stable internet connection.
Create a Disk Image
Once the installation file is downloaded, you will need to create a disk image from it. This disk image will contain all the necessary files for the installation process. To create the disk image, open the Disk Utility application on your Mac, select the installation file, and click on the “New Image” button. Choose a location to save the disk image and select the appropriate format.
Note: It is important to choose the correct format for the disk image, depending on whether you are creating a bootable DVD or a bootable USB drive. Follow the formatting instructions provided by Apple to ensure compatibility.
Once the disk image is created, you can proceed to the next steps to create the bootable disc for your Mac.
Creating a Bootable Disc
Creating a bootable disc for your Mac can be a straightforward process if you follow these easy steps. Whether you need to reinstall macOS, perform a clean installation, or troubleshoot your computer, having a bootable disc can be a lifesaver. Here’s a step-by-step guide on how to create one:
Step 1: Prepare the Required Materials
Before you start, make sure you have the necessary materials. You will need a USB flash drive or an external hard drive with enough storage capacity to hold the macOS installer. You will also need a Mac computer and access to the App Store to download the macOS installer.
Step 2: Download the macOS Installer
Open the App Store on your Mac and search for the macOS version you want to install. Once you find the correct installer, click on the “Download” button. The installer will be saved to your Applications folder once the download is complete.
Step 3: Format the USB Flash Drive
Connect the USB flash drive to your Mac and open the Disk Utility app. Select the drive from the list of available drives, go to the “Erase” tab, and choose the format “Mac OS Extended (Journaled)”. Give the drive a name and click on the “Erase” button to format it.
Step 4: Create the Bootable Disc
Open the Terminal app on your Mac and enter the following command:
sudo /Applications/Install\ macOS\ [version].app/Contents/Resources/createinstallmedia --volume /Volumes/[USB Drive] --nointeraction
Replace “[version]” with the name of the macOS installer you downloaded (e.g., “Mojave”) and “[USB Drive]” with the name of your formatted USB flash drive.
Step 5: Confirm the Erase and Create Process
Once you enter the command, it will prompt you to enter your Mac administrator password. After entering the password, press the “Y” key and hit the “Return” key to confirm the erase and create process. Wait for the process to complete, which may take a while.
With these easy steps, you can create a bootable disc for your Mac and be prepared for any troubleshooting or installation needs. Remember to safely eject the USB flash drive once the process is complete and store it in a safe place for future use.
Booting from the Disc
Once you have created a bootable disc for your Mac, you can now proceed to boot from it. Follow these steps to start your Mac using the bootable disc:
- Insert the bootable disc into your Mac’s CD/DVD drive or connect the bootable USB drive to a USB port.
- Restart your Mac and hold down the Option key while it boots up. This will open the Startup Manager.
- In the Startup Manager, you will see a list of available startup disks. Use the arrow keys to select the bootable disc, then press the Enter key.
- Your Mac will now boot from the selected disc. Follow the on-screen instructions to complete the startup process.
Note that on newer Mac computers with the Apple Silicon chip, you may need to use the Power button instead of the Option key to access the Startup Manager.
Once you have successfully booted from the disc, you can perform various tasks such as installing a new operating system, repairing your Mac’s disk, or running diagnostics.
Remember to eject the bootable disc after you are done using it. To do this, click on the Eject button next to the disc’s name in the Finder or press the Command + E keys on your keyboard.
What is a bootable disc?
A bootable disc is a media storage device, such as a CD or USB drive, that contains an operating system. It allows a computer to start up and run directly from the disc, without needing to access the computer’s hard drive.
Why would I need a bootable disc for Mac?
A bootable disc for Mac can be handy in situations where your computer is not starting up properly or if you want to install a fresh copy of macOS. It allows you to access the operating system and perform troubleshooting tasks or installations.
What do I need to create a bootable disc for Mac?
To create a bootable disc for Mac, you will need a blank CD or USB drive with sufficient storage capacity, a Mac computer, and a copy of the macOS installation file from the Mac App Store.
How do I create a bootable disc for Mac using a blank CD?
To create a bootable disc for Mac using a blank CD, first, insert the blank CD into your Mac. Then, open Disk Utility, select the CD from the left sidebar, and click on the “Burn” button. Finally, choose the macOS installation file as the source and click “Burn” to create the bootable disc.
Can I create a bootable disc for Mac using a USB drive?
Yes, you can create a bootable disc for Mac using a USB drive. Connect the USB drive to your Mac and open Disk Utility. Select the USB drive from the left sidebar, click on the “Erase” button, and choose the “Mac OS Extended (Journaled)” format. Next, open Terminal and enter a command to create a bootable USB drive using the macOS installation file. Wait for the process to complete, and you will have a bootable disc on your USB drive.