32-bit apps. It will only run on macOS Mojave (10.14) or older. Security Risks:
He slammed the laptop shut. When he reopened it, Word 2010 was there. Perfectly functional. Spanish interface. No malware warnings. But every document he saved ended with the same footer, in tiny gray type: office 2010 para mac full espa%C3%B1ol mega full
It is important to note that Microsoft Office 2010 was never released for Mac 32-bit apps