UTIdefaults for Mac

Easily manage default apps, file extensions, and UTIs on macOS with full control

Take full control of file associations on macOS with UTIdefaults, a modern, native utility designed to streamline how your system opens and edits files. Also available on the Mac App Store.Built entirely with SwiftUI and optimized for both Apple Silicon and Intel Macs, UTIdefaults provides a fast, centralized interface to inspect, search, and manage system-wide default applications by UTI (Uniform Type Identifier) and MIME type, eliminating the need to manually adjust settings file-by-file in Finder.

Key features

• Centralized file association management for macOS

• Search and manage file types by name, extension, UTI, or MIME type.

• Set default apps for documents, media, source code, archives, and other file formats.

• Choose separate Viewer and Editor apps for individual file types.

• Switch between Standard and Advanced modes for flexible file association management.

• Browse UTIs with Preferred MIME, Selectable, or Show All visibility levels.

• Assign a safe “Do Nothing” handler to prevent specific file types from opening externally.

• Fast, responsive interface built with SwiftUI and multithreaded architecture.

• Universal Binary with native support for Apple Silicon and Intel Macs.

• Requires macOS 15.6 or later