You can use The Unarchiver from the App Store or install unrar via Terminal using Homebrew .
Download the RAR app by RARLAB from the Google Play Store. 2. How to Open/Extract the File Download 1The2Wol3of4Cor5Cas6Srs7T8C rar
Highlight the items you want to group together. Add to Archive: Right-click and choose "Add to archive..." . You can use The Unarchiver from the App