The Finder alternative macOS should have shipped with
A fast, private, and genuinely beautiful file manager — with multi-pane layouts, advanced search, and every quality-of-life fix Finder never got around to.
That's not a mockup — Cosmil's window is genuinely transparent, blurring and darkening whatever sits behind it.
As many panes as your monitor can hold
Work across folders without a maze of windows. Split into dual, tri, or quad panes — or keep going. Drag between them, compare side by side, and keep everything in view.
In the app: Add panes with ⌘[ / ⌘], close with ⌘⌥W
- Dual, tri, and quad layouts out of the box
- Add as many panes as your screen can fit
- Drag and drop files directly between panes
Find exactly what you're looking for
Stack as many filters as you need and choose how they combine. Search by name, date modified, size, and more — with full AND/OR logic to pin down the one file that matters.
Pause a Drag Operation Whenever You Need To
Mid-drag and not where you need to be yet? Drop your files in the sidebar's temporary dropzone, navigate or create a folder, then pick them right back up — no juggling windows, no restarting the drag.
- Park files in the sidebar mid-drag
- Navigate or create folders without losing your selection
- Grab them again the moment you're ready
Never guess which file to keep
When a transfer hits a name collision, Cosmil shows you exactly what you're deciding between — complete metadata for both files, side by side — so you can resolve it with confidence instead of crossing your fingers.
- See both files side by side with live previews
- Compare parent folder, size, and modified / created / accessed dates
- Skip, overwrite, keep both, or abort — with the full picture in front of you
Speed you can put a stopwatch on
Cosmil's entire backend is native Rust — no interpreted hot path, no bundled browser engine. That isn't a spec-sheet flex. It's the difference between waiting on your file manager and not thinking about it.
Calculating folder size ⌘⇧S
~/Documents/Coding · 398,646 files
Cosmil 0.0s| Result | Time | Relative |
|---|---|---|
| Finder | 6.4s | 1× |
| Cosmil | 0.8s | 8× faster |
Both measured on the same M5 Pro MacBook Pro running macOS 26.5.2 — same folder, same moment, Cosmil against Finder's QuickLook preview pane, which uses the same size calculation Finder does.
Rust all the way down
Every traversal, copy, and size calculation runs as compiled native code — not interpreted script waiting on a runtime.
Memory-safe by construction
Rust rules out the whole class of memory bugs that make file managers corrupt data or fall over mid-transfer.
Native, not a bundled browser
Tauri 2.0 draws on macOS's own WebView and Svelte 5 compiles away the framework, so there's no Electron-sized runtime in memory.
Everything Finder should have been
Cosmil fixes the everyday friction of macOS file management, without giving up the polish Apple's known for.
See the full Cosmil vs. Finder comparisonYour files are none of our business
No analytics, no telemetry, no cloud sync quietly indexing your documents. Cosmil talks to our server twice — to verify your license and to ask whether an update exists — and never about you.
- trackers or analytics
- 0
- files leaving your Mac
- 0
- network requests — your license and update checks
- 2
trackers or analytics
files leaving your Mac
network requests — your license and update checks
That's the whole list. It's a short one on purpose.
Read the privacy policyFAQ
Questions, answered
Everything you need to know before you switch. Still curious about something?
Cosmil is a full-featured file manager built to be your day-to-day driver — multi-pane layouts, real cut & paste, advanced search, and deep macOS integration. Finder stays on your Mac for the few system dialogs that require it, but Cosmil handles everything else.
Completely. Cosmil never sends your files, folders, or activity anywhere. It makes exactly two kinds of network request — verifying your license key and checking whether an update is available — and nothing else leaves your Mac.
Yes. Press the spacebar for QuickLook on any selection, share through the native sheet, and pick up right where you left off with full workspace restoration — windows, tabs, active folders, and pane layouts.
Cosmil supports macOS Ventura (13) and above.
There's no trial build, but every license comes with a 14-day money-back guarantee. Buy it, run it in your real workflow, and if it isn't for you, email us within two weeks for a full refund.
No. Every license is a one-time purchase, priced by how many Macs it activates on, and includes free updates across the Cosmil 2.0 lifecycle. See full pricing.
Yes it does, you can switch your theme preference to light dark, or to automatically match your system settings. We built Cosmil primarily with dark mode in mind so we think it looks better that way, but it's entirely up to your preference!
No, Cosmil isn't, you have to buy and download it from the website. This is for a variety of reasons but mainly due to the fact that window vibrancy is a macOS private api, which is rejected on the app store. Also, a file explorer is a complex app and putting it on the app store could limit it in other unforeseeable ways in the future.
Ready to leave Finder behind?
A one-time payment, tiered by how many Macs you run — backed by a 14-day money-back guarantee.
