Show HN: Imagin Raw – A 9MB Open-Source Alternative to Adobe Bridge for Mac

**Imagin RAW** landed on the Hacker News front page as a Show HN: a 9MB open-source, native macOS app for browsing, culling, and organizing RAW photos, positioned as a lighter alternative to Adobe Bridge. An iOS build is in development as a stand-in for the cluttered Photos app, and the project also aims to serve as a scouting app.

The stack is deliberately mixed for performance and compatibility. The UI is SwiftUI on macOS 14.6 and up, with AppKit and UIKit used for the thumbnails list where SwiftUI was too slow. RAW decoding goes through LibRaw in C++, bridged via Objective-C++; CoreImage handles other formats and acts as a fallback. EXIF is read straight from RAW and JPEG binary structures, and XMP sidecars are read and written for Lightroom and Bridge compatibility. Folder changes use FSEvents; search uses NSMetadataQuery against Spotlight; concurrency mixes Tasks and OperationQueue.

For engineers and builders, the interesting part is not “another photo browser,” but the concrete tradeoffs: drop import workflows with multi-root folders (local disks, external drives, SD cards), keep Lightroom/Bridge metadata workflows via XMP, and fix SwiftUI weak spots with AppKit/UIKit instead of rewriting the whole UI. The 9MB size and native path also set a clear bar against heavy catalog-style tools.

Market context is Adobe Bridge and the macOS/iOS Photos experience: Bridge is the established culling/organizing hub in Adobe’s ecosystem; Photos is the default mobile library that many shooters find cluttered. Imagin RAW targets both edges—desktop Bridge-like browsing without an import step, and a future iOS scouting/culling surface—while staying open source and small enough to treat as a focused utility rather than a full DAM suite.

What to watch next is whether the iOS build ships as a real scouting companion, whether macOS support goes below 14.6 if users ask, and how well XMP round-trips hold up in daily Lightroom/Bridge pipelines. The architecture choices—LibRaw + Objective-C++ bridge, FSEvents, Spotlight search, hybrid SwiftUI/AppKit—are the parts that will either keep culling fast on large folders or force further UI and decoding work.