Totalfinder 1.10.9 Link

Version 1.10.9 specifically addressed stability and compatibility with older versions of macOS (High Sierra and Mojave). It is exceptionally snappy and doesn't hog system resources. However, if you are on a much newer version of macOS (like Sonoma or Sequoia), you should look at the latest updates from the developers, as 1.10.9 is specifically tailored for that older era of the operating system.

This is the "killer feature." It allows you to view two Finder windows side-by-side within a single frame, making file transfers and comparisons incredibly efficient. TotalFinder 1.10.9

For advanced users, the official installation guide on the BinaryAge website provides clear steps on how to manage this safely. Version 1