: Open Terminal (Applications > Utilities) and paste the following command:
A: Approximately 5.2 GB for the bare installer, expanding to 12+ GB when installed. macos high sierra 10136 dmg full
MacBook (Late 2009+), iMac (Late 2009+), MacBook Air/Pro (2010+), Mac mini (2010+), or Mac Pro (2010+). At least 2GB of RAM. : Open Terminal (Applications > Utilities) and paste