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: On high-resolution (Retina) displays, the GUI controls may scale improperly, making the interface difficult to read. Alternatives for macOS
| Problem | Solution | |---------|----------| | | Run from Terminal: ./QModMaster to see error logs. Likely missing Qt libraries → recompile. | | "Serial port not found" | Adapter driver missing. For CH340/CP210x: install driver via brew install --cask silicon-labs-vcp-driver or WCH CH340 driver. | | No response from slave | Check baud rate, parity, stop bits. Use a serial monitor (e.g., screen /dev/tty.usbserial 9600 ) to see raw data. | | TCP connection refused | Disable macOS firewall temporarily: sudo pfctl -d . Or allow port 502 in System Settings > Network > Firewall . | | UI looks broken/zoomed | Set Qt scaling: export QT_SCALE_FACTOR=1 before launching. Or right-click .app > Get Info > check "Open in Low Resolution". | qmodmaster mac
package manager, you may find formulas to install it directly via the terminal. Compile from Source: Download the source code from SourceForge . You will need the installed on your Mac to compile it into an executable app. Security Tip: : On high-resolution (Retina) displays, the GUI controls
: A detailed application note by Cognex explains how to use QModMaster as a free client for testing Modbus TCP communication, covering function codes and register access. Summary of Features for Mac Users | | "Serial port not found" | Adapter driver missing