Microsoft_Office_16.86.24060916_Installer.pkg

For a work or school Microsoft 365 license, the supported download path is the account portal rather than a direct version-specific .pkg link.

For Mac:

1. Sign in to the Microsoft 365 portal for the work or school account.
2. Download the installer from the install page.
3. After the download completes, open Finder > Downloads and double-click the installer package.
4. If the installer does not open, try Safari, move the .pkg file to the desktop, and open it again.
5. If macOS shows an unidentified developer warning, wait 10 seconds, then Control-click the file and select Open.

If the goal is specifically to install an older build because the 2015 Mac cannot run the current release, the available context does not provide an official direct link for Microsoft_Office_16.86.24060916_Installer.pkg for work-license installation.

If the Mac is on the 21Vianet-operated service, the documented path is: Settings > Office 365 Settings > Software > Install Office 2016 for Mac.

After installation, the apps are usually found in:

• Launchpad
• Finder > Applications > Microsoft

References:

• Install Office 2016 for Mac with Microsoft 365 operated by 21Vianet
• Download, install, or reinstall Microsoft 365 or Office 2024 on a PC or Mac
• What to try if you can't install or activate Office for Mac