Install new macos from usb

Here's a step-by-step guide on how to install a new macOS from a USB drive:

Preparation

1. Create a bootable USB drive: You'll need a USB drive with at least 8GB of free space. You can use a tool like DiskMaker X or create a bootable USB drive using the built-in macOS utility, createinstallmedia.
2. Backup your data: Before installing a new macOS, make sure to backup your important files and data to an external hard drive or cloud storage service.
3. Check compatibility: Ensure that your Mac is compatible with the new macOS version you're installing. You can check the system requirements on Apple's website.

Installation

1. Insert the USB drive: Insert the bootable USB drive into your Mac.
2. Restart your Mac: Restart your Mac and immediately hold down the Option (⌥) key while booting up. This will bring up the boot menu.
3. Select the USB drive: Select the USB drive from the boot menu and press the Enter key.
4. Follow the installation prompts: The installation process will begin. Follow the prompts to select your language, country or region, and keyboard layout.
5. Erase your startup disk: You'll be prompted to erase your startup disk. Make sure to select the correct disk and click Erase.
6. Install macOS: The installation process will begin. This may take some time, so be patient.
7. Set up your Mac: Once the installation is complete, you'll be prompted to set up your Mac. Follow the prompts to create a new user account, set up your Wi-Fi network, and more.

Tips and Variations

• Use the built-in macOS utility: If you don't have a bootable USB drive, you can use the built-in macOS utility, createinstallmedia, to create one.
• Use a different USB drive: If you have multiple USB drives, you can use a different one to install the new macOS.
• Install macOS on a different Mac: If you want to install the new macOS on a different Mac, make sure to use the correct USB drive and follow the same installation process.
• Use a third-party tool: There are third-party tools available that can help you install a new macOS, such as TransMac or EaseUS Todo Backup.

Troubleshooting

• Error messages: If you encounter error messages during the installation process, try restarting your Mac and trying again.
• Installation fails: If the installation fails, try using a different USB drive or creating a new one using the built-in macOS utility.
• Mac won't boot: If your Mac won't boot after installing the new macOS, try restarting it in recovery mode and following the prompts to restore your Mac.