Hi I'm new here, I have a macbook Pro that had High Sierra on it, I have formatted the hard drive and I'm trying to install a new copy on it, I'm lost trying to do it myself, need help to do it Please ??
• command R to reinstall the latest macOS that was installed on your Mac, without upgrading to a later version
• option command R to upgrade to the latest macOS that is compatible with your Mac
• shift option command R to reinstall the macOS that came with your Mac, or the version closest to it that is still available