KatSearch is a work in progress and currently only available as an alpha release. Some things will be broken. Caveat emptor!
Mac power-user app to quickly find files on entire APFS and HFS+ volumes by scanning the file system catalog.
KatSearch is written by: Sveinbjörn Þórðarson
Features
Unlike Spotlight, KatSearch performs no indexing and only looks at filenames, not content. It uses a fast low-level kernel call to search the entire file system via the APFS or HFS+ file system catalog.
- Fast, native, modern macOS app with a responsive, powerful, no-nonsense interface
 - Displays live search results
 - Scans the actual file system, not just the userland files Apple wants you to see
 - Can run with admin privileges to find all files irrespective of permissions
 - Ubiquitous native drag and drop behaviour, with hooks into Finder actions/services via contextual menu
 - Supports all the standard Finder keyboard shortcuts for file actions
 - Search windows can be invoked using a global hotkey
 - Includes searchfs, a command line tool counterpart
 - Free, open source software written in Objective-C/Cocoa