# Monochrome Lab PRO

> Official product and documentation site for Monochrome Lab PRO 4.7.4, a professional local-first black-and-white photo workstation for macOS.

## Official links

- [Product overview](https://monochromelab.app/)
- [Learning library](https://monochromelab.app/learn/)
- [Professional workflows](https://monochromelab.app/learn/professional-workflows-4-6/)
- [Press room](https://monochromelab.app/press/)
- [Free trial and licenses](https://monochromelab.app/try/)

## Product facts

- Version 4.7.4 is the current website download, with a free 14-day trial and online license activation.
- M2 is Flat Tone, M3 is red-filtered, and M4 is orange-filtered. Eight-band Color Response tunes captured color as it becomes monochrome tone.
- Six included pre-conversion 3D LAB Profiles and compatible imported .cube LUTs use one visible selection; Profile Strength is not exposed.
- Compare supports two Library photographs; Reference keeps the companion read only. Zoom and pan may be linked or independent.
- Selective Sync Settings copies chosen editing groups. Crop, Masks, Spot Remove, and Layout are opt-in; ratings, tags, albums, and IPTC remain photograph-specific.
- Configurable commands support TourBox, TourBox Elite, and Logitech MX Creative Console profiles without installing device drivers.
- Native high-bit Batch Export runs in the background with progress and cancellation. Export Presets retain output format, quality, color space, size, PPI, sharpening, naming, metadata, and destination behavior.
- Catalog writes are worker-serialized; acknowledged annotations use a local SQLite recovery journal. Relink and Library migration use transactional recovery.
- Photographs and edits stay local. Trial and license activation require an online connection; device proof and license information are sent to the licensing service. Photographs and editing history are not uploaded.
- Pick/Reject and color labels remain deferred. Virtual Copies, Capture Cleanup, Soft Proof, Zone System, and Spot Visualization are not offered.
- USD $129.99 for one computer or $199.99 for two; one-time purchase, no subscription.