MacOS has a built-in Archive Utility, but it often struggles with rarer formats like .RAR or .7z. The Unarchiver is a more powerful, free replacement that handles almost any file type you throw at it.
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Without an unzipper, these files are like locked suitcases—you can see the container, but you can’t use what’s inside. Top 3 Unzipper Tools to Download Today MacOS has a built-in Archive Utility, but it