If you are a professional working in industrial automation, an IoT hobbyist, or a student, QmodMaster for Mac is arguably the best free tool available.
Click → Status bar should show "Connected".
If you frequently require complex serial COM port redirection or industrial USB-to-RS485 adapters that lack official Mac drivers, virtualization is your safest bet.
The macOS version must retain feature parity with the Windows baseline while adhering to Apple Human Interface Guidelines (HIG).
Install the necessary development tools and the Qt framework: brew install qt libmodbus pkg-config Use code with caution. qmodmaster mac
So, how do you get this essential tool running on macOS? Here is your complete guide.
Since QModMaster is built using C++ and the Qt framework, you can compile it natively for macOS Intel or Apple Silicon (M1/M2/M3) chips.
Macs do not use COM1 or COM2 . Instead, they register serial devices as files in the /dev/ directory. Plug your USB-to-Serial adapter into your Mac. Open the Terminal app and type the following command: ls /dev/tty.* Use code with caution.
on how to configure the serial port settings for a USB-to-RS485 adapter on your Mac? If you are a professional working in industrial
Method 1: Compiling QModMaster from Source (The Native Approach)
export PATH="/usr/local/opt/qt@5/bin:$PATH" export LDFLAGS="-L/usr/local/opt/qt@5/lib" export CPPFLAGS="-I/usr/local/opt/qt@5/include"
dyld: Library not loaded: @rpath/QtWidgets.framework/Versions/5/QtWidgets Solution: This means the compiled binary cannot find the Qt runtime.
While a simple "Download for Mac" button doesn't exist for QModMaster, the tool is not out of reach for Apple users. If you are a power user, compile the source with Homebrew. If you want the quickest solution, spin up a Windows Virtual Machine. The macOS version must retain feature parity with
For most automation engineers who just need the tool to work without fiddling with compilers, running the Windows version via virtualization is the best method.
| Feature | QmodMaster (Mac) | Modbus Poll (Paid) | CAS Modbus Scanner | Python (PyModbus) | | :--- | :--- | :--- | :--- | :--- | | | Free | $150+ | Free (Limited) | Free | | Native Mac UI | Yes (Qt) | No (Wine required) | Yes (Java Swing) | CLI / DIY | | Ease of Use | Medium | Low (Wine bugs) | High | Very Low | | Plotting/Graphs | No | Yes | No | Yes (with code) | | Serial Support | Excellent (macOS native) | Poor via Wine | Good | Excellent | | Best For | Engineers & techs | Windows users on Mac | Quick read-only checks | Developers |
To keep the app accessible, run: