A folder full of years of photos, project documents and model files can be hard to search without first moving everything into a new library. That move may not suit people who already keep projects in their own folder structure. Gatterie takes a different approach: it presents selected folders as a visual library while leaving the files where they are.
The app is for macOS, and the developer says it requires Apple silicon. It is paid and sold as a one-time purchase. You can find it on Gatterie’s product page.
A visual layer over folders you already have
Gatterie is best understood as a file browser with photo-library features, not as a place to import and reorganise an archive. You choose folders, then browse their contents as a gallery, folder tree or timeline. The app brings photos, RAW files, videos, PDFs, documents and supported 3D and CAD files into the same view. Its stated aim is to help people inspect a collection without changing its underlying structure.
Finding something again relies on familiar tools: search by filename or tag, mark favourites with stars, and combine filters. The timeline uses photo metadata to group items by date. That should help when a person remembers roughly when an image was taken but not which project folder contains it. The approach also suits mixed work folders, where a picture may sit beside a brief or a PDF rather than inside a dedicated photo catalogue.
The breadth of formats does not mean every file gets the same kind of preview. Gatterie says it uses local previews for some formats, macOS Quick Look for others, and a format tile when it cannot display a file. That distinction matters if the main goal is to inspect specialist creative files without opening their original applications. It is a visual index, not a guarantee that every item will be rendered in detail.
Maps depend on metadata, not magic
For photos with GPS information in their metadata, Gatterie can show where they were taken on a map. Photos are grouped by place, and the map view can be narrowed by year and month. The app can connect locations in the order photos were taken, producing tour lines that make an outing easier to follow.
There is a useful limit to that feature: the lines represent the sequence of photo locations, not the actual route travelled. And photos without GPS metadata will not gain a location from being placed in the library. The offline map is the default, according to the developer; online maps are optional. So this is a GPS photo map for geotagged collections, not a general-purpose trip tracker.
The map is one part of a wider set of ways to inspect files. Videos can appear with thumbnails and play in Gatterie. The built-in 3D viewer lets you rotate and zoom supported models, with the developer noting that display depends on the format and model. If a file cannot be rendered, it remains accessible as a format tile. For a 3D-printing or design archive, that can help identify a model before opening it in specialist software, but it does not turn Gatterie into a modelling tool.
Useful extras, with boundaries
A modest image editor handles adjustments to light and colour, straightening and cropping. The description says edits are saved as new copies, leaving the original in place. That makes it suited to quick corrections while browsing, not to replacing a full editing workflow.
The developer also describes optional local AI for suggested tags and image descriptions. It requires a separately configured compatible model service, and suggestions are reviewed before use. That setup is an extra step, not a requirement for the core browsing features. The developer says the app works locally without an account or cloud requirement, but the AI option depends on the user’s own configuration.
Gatterie’s central trade-off is clear. Keeping files in existing folders avoids a migration, but it also means the app’s usefulness depends on those folders and the metadata already present. Search can use filenames and tags; maps need GPS data; previews vary by format. The app does not remove the need to maintain a sensible archive or to use dedicated tools for deeper editing and 3D work.
Gatterie is aimed at Mac users with scattered or mature collections who want to browse photos, documents and models together without importing them into a new library. It is a poor fit for Windows users, people who need every format rendered in full, or anyone looking for a complete photo editor or 3D design environment.
Visual file library with GPS photo maps and a 3D viewer