How can I open 7-zip file on macOS?

While The Unarchiver app is a popular and user-friendly app for extracting 7-Zip archives on macOS, there are some reasons why you might want to avoid using it for 7-Zip (.7z) files in certain cases.

1. Limited Support for Advanced 7-Zip Features
 No support for some 7-Zip compression methods: The Unarchiver may struggle with .7z files using LZMA2, BZip2, or PPMd compression. Some archives might fail to extract or produce errors.

No encryption (AES-256) support: If the .7z file is password-protected, The Unarchiver might not handle it properly.

2. No Ability to Create .7z Files

The Unarchiver is only an extractor—it cannot create .7z archives. If you need to compress files into .7z, you’ll need another tool (like fosszip).

3. Slower Performance on Large Archives

The Unarchiver is optimized for simplicity, not speed. For very large .7z files, dedicated tools like Keka or the command-line p7zip may be faster.

4. No Split Archive Support 

Some .7z files are split into multiple parts (e.g., archive.7z.001, archive.7z.002). The Unarchiver does not automatically combine them.

Based on the above facts, please don't use this app to open 7-zip file on macOS. There are many better apps out there!