: Microsoft has reportedly shut down some older activation servers. Even with a valid key, you may encounter errors when trying to activate a new installation. 2. Critical Compatibility Warnings

: Programs like LibreOffice or Apple’s built-in Pages app can open and save Word documents for free. How to get Microsoft Word for free on Mac - Macworld

Buying Microsoft Word 2011 for Mac today is generally because it is obsolete, unsupported, and will not run on modern Macs. If you still want to proceed, 1. Current Availability

: It only works on older Intel-based Macs running macOS 10.14 Mojave or earlier.

: A standalone version for those who want to avoid subscriptions.