The most popular free choice for macOS users.
If the files inside have strange extensions (like .exe or .scr ) and you were expecting documents or images, delete them immediately . SPECIAL1233.rar
Right-click the file and select "Extract Here" or "Extract to SPECIAL1233/" . The most popular free choice for macOS users
If you see files like SPECIAL1233.part1.rar , you need all numbered parts in the same folder to extract the data. SPECIAL1233.rar