Ensure all files have the exact same base name before the "partXX" suffix.
Many RAR packs (especially from forums or archives) are password-protected. Check the source where you found the links for the required key. pack.part01.rar
A highly reliable one-click solution for Mac users. 3. How to Extract Navigate to the folder containing all the parts. Right-click only the first file ( pack.part01.rar ). Select "Extract Here" or "Extract to [Folder Name]" . Ensure all files have the exact same base