Right-click the file and select Open With > Archive Utility . This is built into macOS and handles basic 7z extraction.
A popular free alternative on the App Store that handles more complex or password-protected archives. For Mobile Users 1stSeason.7z
"" is a compressed archive file typically containing media files, such as video episodes or soundtracks from a TV series or anime. The .7z extension indicates it was created using 7-Zip , a free, open-source file archiver known for high compression ratios. How to Open and Extract 1stSeason.7z Right-click the file and select Open With > Archive Utility
To access the contents of this file, you must use an extraction tool compatible with the 7z format. For Windows Users For Mobile Users "" is a compressed archive
Download and install the version matching your system (32-bit or 64-bit). Right-click the file.