Which macOS version was the last to include the Dashboard feature?

macOS Mojave (10.14) was the last macOS version to include the Dashboard feature.

Dashboard debuted in Mac OS X Tiger 10.4 as a dedicated space for small widgets, including Weather, Stocks, Calculator, Stickies, and Dictionary. Users could open Dashboard from the Dock, Launchpad, a keyboard key, or a configured hot corner. In OS X Lion, it became configurable as a separate desktop space.

Dashboard was still present in Mojave, released in 2018, although Apple had already disabled it by default starting with OS X Yosemite. macOS Catalina 10.15, released in 2019, removed Dashboard entirely. This makes Catalina a common mix-up: it was the first version without Dashboard, not the last version with it. Modern macOS later brought desktop widgets back in Sonoma, but those are a newer system integrated with Notification Center rather than the original Dashboard environment.