When comparing TotalFinder vs ForkLift 3, the Slant community recommends ForkLift 3 for most people. In the question“What are the best Mac file managers?” ForkLift 3 is ranked 5th while TotalFinder is ranked 21st. The most important reason people chose ForkLift 3 is:
It's just a perfectly crafted app, try and enjoy
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Adds dual panes to the Mac finder
A great feature of TotalFinder is the ability to have dual panes. This is really handy for moving files around.
Pro Adds cut/paste context menu functionality to Finder
You can cut and paste with just the mouse.
Pro Copy path to file or directory feature
You can copy the path to a directory or file using the context menu in Finder, options include POSIX Path, URL, Windows Path, UNC Path, HFS Path, and Terminal Path.
Pro Best UX/UI'd file manager on the market
It's just a perfectly crafted app, try and enjoy
Pro Rewritten in Swift
Forklift 3 is a significant update from FL2, having been rewritten entirely in Swift.
Pro Optional dark UI
In addition to the default Mac gray UI, Forklift 3 offers an alternate "Dark Mode" featuring light text elements against dark backgrounds.
Pro Connect to and mount lots of storage options
FTP, WebDAV, Amazon S3, Backblaze B2, Google Drive, Rackspace CloudFiles, SMB, AFP, NFS, VNC, etc.
Pro Easily toggle hidden files
Pro Built-in application remover
Cons
Con Requires special installation procedure in El Capitan and later due to "System Integrity Protection"
"System Integrity Protection" (also know as "Rootless") is a feature introduced in El Capitan that, among other things, inhibits applications to inject code on system apps (TotalFinder injects code into Finder).
For TotalFinder to work properly one must disable SIP temporarly to install. After installation a user can turn SIP back on without issue.
Instructions are detailed here.