Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Hello, thank you for reaching out to Microsoft Q&A.
Based on the information you provided, I understand that you’re having trouble installing or running Microsoft 365 applications on your older Mac, which is currently running macOS 13 (Ventura).
As of September 2025, the three latest major versions are macOS Tahoe, macOS Sequoia, and macOS Sonoma. Therefore, the September 2025 update (16.101) is the final build to support macOS Ventura.
You can download the 16.101 (or) version below than this from the official Microsoft website and install it on your device.
https://learn.microsoft.com/en-us/officeupdates/update-history-office-for-mac
Uninstall all previous Office apps from Find > Applications, then install the older Office packages. You can download the Install package (the full installer) for version 16.101, not the update packages.