Download and install the version matching your system (32-bit or 64-bit). Right-click the file.
Use apps like iZip or ZArchiver . Open the app, locate the file, and select the extract option. Common Issues & Security Open 7z Files With WinRAR: Extract 7Z file 1stSeason.7z
A popular free alternative on the App Store that handles more complex or password-protected archives. For Mobile Users Download and install the version matching your system
Recent updates allow you to right-click the file and select Extract All... without additional software. 7-Zip (Recommended): locate the file