Microsoft Office 2019 for Mac will still open your documents after July 13, 2026 but you will not be able to edit, create or save files. This happens because Microsoft has ended support for Office 2019 so it can no longer get the updates needed to keep full features working. If you are using Office 2019 the best option is to upgrade to Microsoft 365 or Office 2021 so you can keep editing documents normally and continue getting updates in the future.