There's a Legacy apps tool in macOS Mojave. Here's how to use it.
At the 2018 Worldwide Developers Conference (WWDC), Apple confirmed macOS Mojave would be the last version to support 32-bit apps. To help developers and users alike find out whether their Macs use these apps, Apple has introduced a tool in the System Report in macOS Mojave. Though similar to a tool found in macOS High Sierra, this one makes it even clearer that support will soon end for these apps.