MacOS Tips » History » Revision 16

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Dave Nathanson, 07/19/2014 10:56 AM

h1. Application Security in 10.9.x

As of 10.9, signed packages are required by default. Apple charges for this capability, and requires use of their tooling to do it. For the time being, MacOS users should disable signed package checking for CHIRP. Instructions provided by Jim, K2SON:

# Locate the app in Finder.
# Right click (control-click if you don't have a Magic Mouse) on the app and click Open.
# You will get a dialog box about it being an unsigned app, click the Open button.
# Enter the userid and password of the Administrative login.
# The app will now be flagged to allow it to be opened normally in the future.

Alternately, you can disable them for your entire system, although this has security implications that should not be ignored. Instructions for this provided by Tom, KD7LXL:

# Open your System Preferences
# Go to Security & Privacy, General tab.
# Click the lock
# Then choose Allow apps downloaded from: Anywhere.

h1. Mac USB Drivers

h2. FTDI cables

Note that with Mac OSX 10.9 "Mavericks", Apple provides their own driver for FTDI chipset. You may need to remove the OEM FTDI driver and use only the Apple FTDI driver, or you may need to disable the Apple FTDI driver and install the OEM FTDI drivers. YMMV.
Version 1.5.1 is available for Mac OS X on 64 bit, 32 bit and PPC machines.

h2. Prolific PL-2303 cables - official drivers for the genuine Prolific cables

FYI: your cable, if using Prolific chipset, is more likely to be using a counterfeit chip than an original.
Login as guest/ guest & look in the Support section. Specified to work with Mac OSX 10.6, 10.7, & 10.8.

h2. Generic PL-2303 cables (counterfeit and/or “Generic”)

For Lion (10.7.x), Mountain Lion (10.8.x), and Mavericks (10.9.x):
You can try this one, which install open source pl2303 driver and remove any other driver versions: At this web page you may need to right-click or control-click to link to get it to download. After downloading, you may need to control-right click, then open in order to bypass Mac Gatekeeper.

For earlier versions of Mac OS X up to 10.5 Leopard. Also some reports of success with Snow Leopard, Lion:

h2. RTSystems cables

h2. Silicon Labs CP210x USB to UART Bridge VCP Drivers (including Kenwood TH-D72)

h1. Tips

  • In many cases you need to connect the cable to the radio first, then power the radio on, while holding down some buttons. The exact procedure varies by radio.
  • Some radios need to be put into a "clone" mode to transfer to PC, some radios may need to be configured to use the mic/speaker jacks for PC transfer instead of for the speaker/mic. The exact procedure varies by radio.
  • You will need to download from the radio to CHIRP first, before uploading anything to the radio. CHIRP creates a template from the radio download so it knows how to talk to the radio.
  • If you want to download from one radio and upload those settings to another radio, first download from each radio to a separate “tab” of CHIRP. Then copy/paste from one tab to the other & upload back to the same radio that produced that tab. Do not try to upload to a radio directly from a tab that was not downloaded from that same radio.
  • Many USB to serial cables include a counterfeit Prolific chip. This can cause connection problems because the official Prolific driver will ignore the counterfeit chip. Some people have reported success by using an older version of the Prolific driver, or a 3rd party driver.
  • If you are using multiple USB cables, each will create a different “virtual port”, meaning that you will need to select the correct virtual port for your radio when connecting to your radio. CHIRP will give you this opportunity each time you download from the radio.
  • If CHIRP won’t launch & won't run, you may have neglected to install the Python runtime. CHIRP needs that. Even though Mac OS X includes Python built-in, the runtime has to be installed is because it includes PyGTK and some other libraries that Chirp requires, in addition to Python itself:
  • If your radio is not "Supported", you can try downloading the newest Daily Build to see if support was recently added.

h1. Troubleshooting

You can verify that the drivers are installed & working by connecting the USB cable to your Mac, then running “System Profiler”, or “System Information” (found in /Applications/Utilities ). When the USB cable is connected and drivers correctly installed, the cable will show up in the USB section of the System Profiler.

Another way to see that the driver is correctly installed is to open Terminal and type:

ls /dev/cu*

It will return a list of virtual serial ports including something similar to:

/dev/cu.usbserial-A501XQ5I     (suffix will vary)

You may also type:


That will return a long list of kexts, including something similar to this at the bottom (most recently installed are listed last):

142    0 0xffffff7f81fc8000 0x8000      0x8000     com.FTDI.driver.FTDIUSBSerialDriver (2.2.18) <112 32 5 4 3 1>

Look at the CHIRP log for clues.


Join the Mailing list & search the archives for similar problem reports & how they were resolved, and/or ask the group. Please include enough info about the problem and situation so the community will be able to help you.

Not all functionality is supported on all radios. See "Model Support":

h2. CHIRP Beginners Guide

Beginners Guide

Updated by Dave Nathanson about 9 years ago · 16 revisions