The Unarchiver or Keka are the gold standards for extracting RAR files on macOS.
This post provides a technical overview and troubleshooting guide for handling compressed EP archive files. EP.rar
Check the source website, email, or README file where you found the link. Passwords are often the URL of the site or the artist's name. 3. Missing File Parts (.part1.rar, .part2.rar) The Unarchiver or Keka are the gold standards