Cosmil
A faster, more beautiful Finder alternative built for macOS
Cosmil is a fast, privacy-focused, and beautifully designed file manager for macOS created as a modern alternative to Finder. Built with a compiled Rust backend and a lightweight Tauri/Svelte frontend, it solves Finder's most persistent pain points with multi-pane workspaces, on-demand folder sizing, and comprehensive keyboard-driven workflows.
Key Features
Arbitrary Multi-Pane Layouts – Split a single window into dual, tri, quad, or nth-pane layouts to browse and drag files between folders seamlessly without opening dozens of detached windows.
Compiled Rust Performance – Utilizes a native Rust backend and viewport virtualization to calculate folder sizes up to 8x faster than Finder and open folders containing 40,000+ files with zero UI lag.
Advanced Live Search – Build complex queries with AND/OR filter chaining without slow, background database indexers that miss real-time file updates.
Quality-of-Life Fixes – Features real cut-and-paste (⌘X / ⌘V), sidebar drag dropzones, a unified file operation job manager, and side-by-side file conflict resolution with live previews.
Zero Telemetry & One-Time Pricing – Completely offline file operations with zero analytics or tracking, distributed via perpetual one-time licenses rather than recurring subscriptions.
Who Is It For?
Cosmil is ideal for Mac power users, designers, software engineers, and media professionals who need efficient file management, side-by-side directory comparisons, and responsive performance without the clutter and limitations of default macOS Finder.
Why Use Cosmil?
If you love the aesthetics of macOS but are frustrated by Finder's rigid single-folder views, sluggish folder size calculations, and awkward file conflict dialogues, Cosmil delivers a sleek, translucent, and blazing-fast upgrade tailored specifically for modern Mac workflows.
Platform & Compatibility
Architecture
Minimum macOS
macOS Sonoma 14Public Opinion
Curated highlights from Reddit and other communities, not user-submitted reviews.
“Reddit users in r/macapps praised the multi-pane implementation, noting that being able to expand beyond standard dual-pane views into tri- or quad-pane setups makes organizing dense project directories effortless.”
Reddit r/macapps: Cosmil 2.0 Launch Discussion
“Mac power users appreciate the snappy directory scanning and instant folder size calculations powered by the Rust backend, avoiding the spinning pinwheels typical of large folders in Finder.”
“Community members highlighted the one-time purchase license model with free version updates as a welcome alternative to subscription-heavy competitors like Path Finder.”
“Unlike mature competitors such as ForkLift, Cosmil currently lacks remote server integration (such as FTP, SFTP, WebDAV, or cloud storage syncing), which limits its utility for remote server administrators.”
Cosmil FAQ: Remote Location Support
“Because it relies on custom macOS vibrancy APIs and low-level system integrations, it is not distributed on the Mac App Store, requiring users to purchase and update directly via the developer's website.”
“Some prospective buyers express hesitation over the lack of an unrestricted free trial build, having to rely instead on the 14-day money-back guarantee to test it in their workflow.”
Community