How to make USB bootable macos?

If you need to install macOS on your Mac or create a bootable USB drive for troubleshooting purposes, having a USB bootable macOS can be extremely helpful. A bootable USB allows you to start up your Mac from an external drive when your internal drive is having problems or you want to perform a clean installation of macOS. In this article, we will guide you through the steps of creating a USB bootable macOS. So, let’s get started!

Requirements:

Before we begin, make sure you have the following requirements fulfilled:

– A USB flash drive with at least 16GB of storage.
– A stable internet connection.
– Access to a Mac computer.

Step 1: Download the macOS Installer

The first step is to download the macOS installer from the App Store. To do this, follow these instructions:

1. Open the App Store on your Mac.
2. Search for the desired macOS version, such as “macOS Big Sur.”
3. Click on the “Get” or “Download” button to start the download.

The macOS installer will be saved in the Applications folder by default.

Step 2: Prepare the USB Flash Drive

Now that you have the macOS installer downloaded, it’s time to prepare the USB flash drive. Follow these steps:

1. Insert the USB flash drive into your Mac.
2. Open the Disk Utility application. You can find it in the Utilities folder within the Applications folder or search for it using Spotlight.
3. Select your USB drive from the list of available drives.
4. Click on the “Erase” button in the toolbar.

Make sure to choose a suitable name and format for the USB drive. We recommend selecting “Mac OS Extended (Journaled)” as the format type.

Step 3: Create a USB Bootable macOS

Now comes the crucial step of turning your USB drive into a bootable macOS installer. Follow these instructions carefully:

1. Open Terminal. You can find it in the Utilities folder within the Applications folder or search for it using Spotlight.
2. Copy and paste the following command into Terminal:

sudo /Applications/Install macOS [macOS Version].app/Contents/Resources/createinstallmedia –volume /Volumes/[USB Drive Name] — /Applications/Install macOS [macOS Version].app

Make sure to replace “[macOS Version]” with the name of the macOS you downloaded (e.g., “macOS Big Sur”) and “[USB Drive Name]” with the name of your USB drive.

3. Press Enter and enter your administrator password when prompted. Terminal will now create the bootable USB macOS.

Note: This process may take some time, so please be patient.

Frequently Asked Questions (FAQs)

Q1: Can I use a Windows PC to create a USB bootable macOS?

No, the Terminal commands used to create a USB bootable macOS are specific to macOS, and therefore, you need access to a Mac computer.

Q2: Can I use a USB drive smaller than 16GB?

No, the USB drive must have at least 16GB of storage to accommodate the macOS installer.

Q3: Can I use a USB drive that already has data on it?

No, creating a USB bootable macOS will erase all the data on the drive. Make sure to back up any important files before proceeding.

Q4: Can I create a USB bootable macOS without downloading the installer?

No, you need to download the macOS installer from the App Store to create a bootable USB drive.

Q5: Can I use an external hard drive instead of a USB drive?

Yes, you can use an external hard drive instead of a USB drive, following the same steps outlined in this article.

Q6: Can I use an older macOS version to create a bootable USB for a newer macOS version?

No, it is recommended to use the same macOS version to create a bootable USB. However, you can create a bootable USB for a newer macOS version using a Mac running the same or a more recent version.

Q7: Can I use a USB-C drive with a USB-A adapter?

Yes, you can use a USB-C drive as long as you have a USB-A adapter or a computer with USB-C ports.

Q8: Can I use a bootable USB on multiple Macs?

Yes, you can use a bootable USB drive on multiple compatible Mac computers.

Q9: Can I create a USB bootable macOS from a Hackintosh?

While it’s technically possible, it’s not recommended to create a bootable USB macOS from a Hackintosh. It’s better to use a genuine Mac computer.

Q10: Can I use an older macOS installer to downgrade my Mac?

Yes, you can use a bootable USB drive with an older macOS installer to downgrade your Mac’s operating system.

Q11: Can I create a bootable USB for multiple macOS versions?

No, you can only create a bootable USB for a single macOS version.

Q12: Can I reuse the USB drive after creating a bootable macOS?

Yes, once you have created the bootable USB drive, you can reformat the drive and use it for other purposes if needed.

Now that you have successfully created a USB bootable macOS, you can use it to upgrade, clean install, or troubleshoot your Mac. Remember to keep the USB drive in a safe place for future use.

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