: Use The Unarchiver or Keka, both of which are common free choices for opening .7z files on Mac.
: This likely refers to the year the data was created or the version of the guide. 03HR45GG85S_2020.7z
: Install the 7zip package (formerly p7zip ) and use the command line or a GUI archive manager like Ark. : Use The Unarchiver or Keka, both of