Don’t Believe System Information’s Legacy Software
Mojave introduces a new feature in its bundled tool System Information: in the Software section is a list of Legacy Software. According to Apple’s Support Note:
If you’re using macOS Mojave, select Legacy Software in the sidebar to see all applications that have not been updated to use 64-bit processes.
Only what you’ll see in Legacy Software is far from complete, and thoroughly misleading.
Previously: ScanSnap 64-bit Software Update, Removed in macOS 10.14 Mojave.