MacOS High Sierra-32GB USB Bootable Drive

1. Prepare Your MacBook

• Check Compatibility: Ensure your MacBook is compatible with macOS High Sierra (see the compatibility list above).
• Backup Your Data: Use Time Machine or any other backup method to secure your files before installation.

2. Boot From the USB Drive

1. Insert the USB Drive: Plug the High Sierra USB installer into your MacBook.
2. Restart Your MacBook:
   • Turn off the MacBook.
   • Power it on and immediately hold down the Option key until the boot menu appears.
3. Select the USB Drive:
   • In the boot menu, select the USB drive (it will be labeled something like “Install macOS High Sierra”).
   • Press Enter to boot from the USB.

3. Access macOS Utilities

Once booted, you’ll see the macOS Utilities screen. From here, you can choose either an upgrade or a clean installation:

4. Clean Installation (Recommended for Better Performance)

1. Open Disk Utility:
   • Select Disk Utility and click Continue.
2. Erase the MacBook Drive:
   • In Disk Utility, select your MacBook’s internal drive (e.g., “Macintosh HD”).
   • Click Erase.
   • Choose:
     • APFS (if you have an SSD).
     • Mac OS Extended (Journaled) (if you have an older HDD).
   • Click Erase and wait for the process to complete.
   • Close Disk Utility when done.
3. Install macOS High Sierra:
   • Select Install macOS High Sierra from the macOS Utilities menu.
   • Follow the on-screen instructions to install the operating system on the newly erased drive.

5. Upgrade Installation (Keeps Existing Data)

If you want to keep your current files and apps:

1. Select Install macOS High Sierra from the macOS Utilities menu.
2. Follow the on-screen instructions.
3. The installer will upgrade your current macOS version to High Sierra.

6. Post-Installation Steps

• After the installation completes, your Mac will restart.
• Follow the setup assistant to configure your MacBook.
• Restore data from your backup if you performed a clean install.
• Update macOS High Sierra to the latest version available via System Preferences > Software Update.

Troubleshooting Tips

• USB Not Showing in Boot Menu:
  • Ensure the USB is properly formatted and contains the correct macOS High Sierra installer.
  • Use another USB port or re-create the installer if necessary.
• Installation Fails:
  • Reset the NVRAM/PRAM by restarting the Mac and holding Command + Option + P + R.
  • Check the USB drive for errors.