Since macOS natively supports disk images, you don't need extra software to open the .iso file.
The 2021 version brought several Mac-specific enhancements over the 2019 predecessor: mul-office-home-and-business-2021-for-mac-dvd-d62b78e4.iso
| Risk Level | Consequence | |------------|-------------| | | Malware infection – ransomware, keyloggers, cryptominers, or remote access trojans | | Medium | Modified installer – may install a “cracked” version that eventually stops working or phones home to malicious servers | | Low | Just a non-functional, corrupted, or repackaged legitimate installer (but still illegal to distribute) | | Very Low | Actually a legitimate, untouched installer (almost impossible given naming) | Since macOS natively supports disk images, you don't