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
Right-click the file and select Open With > Archive Utility . This is built into macOS and handles basic 7z extraction. 1stSeason.7z
A popular free alternative on the App Store that handles more complex or password-protected archives. For Mobile Users Use apps like iZip or ZArchiver