how to reinstall mac os from usb

Creating a Bootable USB: Preparing Your Mac for OS Reinstallation #

Before reinstalling macOS from a USB drive, it is essential to create a bootable USB first. This allows for a smooth and efficient installation process. To begin, make sure you have a USB drive with at least 12GB of storage space and a reliable internet connection.

To create a bootable USB, start by downloading the macOS installer from the App Store. Once the download is complete, the installer will automatically open. However, do not proceed with the installation. Instead, close the installer and connect the USB drive to your Mac. Open Disk Utility from the Utilities folder, select your USB drive, and click on the "Erase" tab. Choose the appropriate format (usually Mac OS Extended Journaled) and give it a name. Once the drive is erased, open Terminal and enter the command to create the bootable USB. Finally, wait for the process to finish, and your bootable USB is ready for use.

Swift and Secure: Step-by-Step Guide to Reinstalling macOS from USB #

Now that you have created a bootable USB, it’s time to reinstall macOS on your Mac. Begin by shutting down your Mac completely. Next, insert the bootable USB drive into one of the USB ports on your Mac. Press the power button and immediately hold down the "Option" key on your keyboard. This will prompt your Mac to display the Startup Manager, which shows all available startup disks.

Use the arrow keys to select the USB drive labeled with the macOS installer. Once selected, press Enter to start the installation process. Follow the on-screen instructions, carefully reviewing the options and selecting the appropriate settings. You will need to agree to the software license agreement and choose the disk where you want to install macOS. Be cautious and double-check your selection to avoid accidentally overwriting important data.

Reaping the Benefits: Finalizing the Reinstallation Process #

After completing the installation process, your Mac will restart and display the Setup Assistant. Follow the steps to set up your Mac, including selecting your country, keyboard layout, and Wi-Fi network. You will also have the option to sign in with your Apple ID or create a new one. Once you have configured these initial settings, your Mac will automatically log in to macOS. However, keep in mind that some additional steps, like transferring data from a Time Machine backup or reinstalling applications, may be required depending on your preferences.

Reinstalling macOS from a USB drive provides a swift and secure solution for reviving your Mac. By creating a bootable USB and following the step-by-step guide, you can easily restore your Mac’s operating system. Remember to back up your important data before reinstalling macOS to avoid any potential data loss. With just a little time and effort, you can have your Mac up and running smoothly once again.