KB76: PR3 - Running with JMRI on Mac OS 10.5

This article was last updated on Jan. 5, 2012, 5:02 p.m. | Print Article | Leave Feedback

Running the PR3 with JMRI on MAX OS 10.5 (Leopard)

Plug in the Digitrax PR3 to a USB port on an Intel-based Apple computer running MAC OS version 10.5. Within about a second the Green "USB" led on the PR3 should glow steady green showing a USB connection has been established with the MAC.

Open system profiler and under hardware>USB there should be a entry "Vcom" showing that the USB port has enumerated OK. This optional step is simply to check the PR3 device was found.

Go to JMRI sourceforge projects on the Web,
here and follow the instructions to download JMRI projects.

; With our test new 2008-vintage Intel based Mac-Mini we did not need to load LibUSB drivers, since this machine recognized the USB device as a VCOM USB modem fine. Additionally the Java version Apple factory installed (Java version 1.50_13) supported the JMRI version 2.0 with no problem, or updates required.

Run "Locotools" from the JMRI download folder or location saved at step 3. Open e.g. LocoTools Preferences and select Layout Connection as "LocoBuffer USB" device , then for serial port select "/dev/tty.usbmodem[****] ", where [****] is a unique identifier the MAC OS applies to the specific physical USB port the PR3 was connected to. At this point the Baud rate and handshaking selections are irrelevant to USB operations, and can be ignored.

If the PR3 is connected to a LocoNet command station it should now be possible to run e.g. the LocoNet Monitor screen function and see messages on the Loconet. If you do not have a throttle connected you can turn the Command Station to "Sleep" and the GPOFF message should appear in the Monitor window.


This install was successful here at Digitrax with minimal effort, and other combinations of Apples PC's (e.g. based on PowerPC CPU's), VMWare Fusion, and OS versions may operate with user customization, but Digitrax cannot offer any opinion or support for these combinations since we have no direct knowledge of successful operation or integration.

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