Mac NMEA Sniffer
A native macOS diagnostic viewer for NMEA2000/CAN and NMEA0183 over USB or LAN/WLAN TCP/UDP adapters, read-only Signal K streams, Network Doctor findings, adapter-format learning, and raw NMEA0183 blackbox recording.
Requires macOS 13 Ventura or newer. Supports Intel and Apple Silicon Macs.
You need to see what is really moving through a boat data system without drowning in repeated frames and raw hex.
Supports NMEA2000/CAN, NMEA0183, read-only Signal K streams, USB serial, UDP/TCP and common adapter text formats.
You need an existing boat-data source or adapter to read from.
That can be a USB serial feed, USB-CAN text adapter, LAN/WLAN TCP or UDP gateway, or a read-only Signal K server on the boat network.
Use it when you need to see what is really moving through a boat data system without drowning in repeated frames and raw hex.
Click any screenshot to open it full size. The app supports both dark and light appearance modes.
Release type: Public production
KSF NMEA Sniffer is provided free of charge and is used at your own risk. It has no warranty and does not replace approved navigation instruments, safety equipment, certified diagnostics, or skipper judgement.
Requires macOS 13 Ventura or newer. Supports Intel and Apple Silicon Macs.
Advanced verification: SHA-256 f7c30f12fd57aefa47cc7d24974e60b06f8adfe93c85cf2ac52caadbb0a90fcb
Read the manual before relying on the app for onboard diagnostics. The same manual is bundled inside the app under the Help menu.
The Mac apps are ready to use now as standalone tools. The autopilot suite remains under test during the 2026 sailing season, with a small group of interested sailors planned after the first sea-trial phase.
The onboard control and safety platform with steering intelligence, UI, gateway, sensors, weather, logs and iPad workflows.
A native macOS utility that reads local AIS/NMEA0183 and forwards approved AIS sentences to internet receiver services.
A native macOS passage logbook, readiness, Voyage Story, Where Is? inventory, provisioning, route archive and voyage record tool.
USB and LAN/WLAN NMEA2000/CAN and NMEA0183 inputs, read-only Signal K, Network Doctor, adapter learning, filters, PGN rates, JSON decoders, capture logs and raw NMEA0183 blackbox recording.
The app is for diagnostics and inspection. It does not steer the boat, transmit on NMEA2000/NMEA0183/Signal K, replace certified instruments, or replace watchkeeping.
