macOS Image Viewer  ·  v0.2.0

Reservoire

A fast, minimal image viewer for macOS. Browse folders, view images fullscreen, run slideshows, and keep your library organised — all from a lightweight native app.

Download for macOS v0.2.0  ·  Apple Silicon  ·  Free

Features

Folder browsing

Open any folder and browse its images as a scrollable thumbnail grid.

Fullscreen viewer

Zoom, pan, and navigate images with keyboard shortcuts in a clean dark viewer.

Slideshow mode

Auto-advance through images at a configurable interval. Pause with the space bar.

Open With support

Set Reservoire as your default viewer. Files open directly into fullscreen from Finder.

Copy & Move

Right-click any image to copy or move it to another folder, or send it to Trash.

Live thumbnails

Thumbnails are generated on demand and cached for instant subsequent loads.

Supported formats

JPG PNG WebP GIF TIFF BMP HEIC WebM

Under the hood

Framework Tauri v2 Native macOS shell written in Rust. Thin, fast, no Electron overhead.
Frontend React 18 + TypeScript UI layer compiled by Vite and rendered in macOS WebKit.
Backend Rust File I/O, thumbnail generation, move/copy/trash operations, and OS event handling.
Thumbnails Node.js sidecar (Sharp) A bundled sidecar process handles image resizing outside the main thread.
Persistence tauri-plugin-store Lightweight JSON store for last folder, slideshow interval, and UI state.
Platform macOS (Apple Silicon) Built for arm64. Requires macOS 11 Big Sur or later.

Installation

  1. Download the DMG file using the button above and open it.
  2. Drag Reservoire.app into the Applications folder shortcut inside the DMG window.
  3. On first launch, right-click the app icon → Open and confirm the dialog. This is only required once for unsigned apps. Alternatively, run the following in Terminal after installing: xattr -cr /Applications/Reservoire.app
  4. To make Reservoire your default image viewer, right-click any image file in Finder → Get Info → Open With → select Reservoire → click Change All.

Apple Silicon only. Reservoire 0.2.0 is compiled for arm64 (M1 and later). Intel Mac support is not available in this release. The app is unsigned and distributed free of charge — no App Store, no subscription.