Whenever there’s a major OSX release, I take the chance to clean-up my Mac by doing a clean install. This is my way to make sure that there will be no incompatible apps installed.
Here are the steps to prepare a USB Installer for High Sierra:
- Download High Sierra from App Store.
2. Prepare a thumb drive with atleast 12GB capacity (requirement according to Apple Support). Make it sure that there are no important files saved since it will be wiped out upon creating the installer.
3. Once the download is finished, insert your thumb drive and take note of its name.
4. Open a Terminal.
5. Execute this command:
sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/<Thumb Drive Name>
6. Then we wait until preparation is done. Be patient, this might take a while.
Once done, you should see a prompt like this: