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Connecting your Radio to your Computer

Their are two major Radio-Computer connection channels, CAT and Audio...

CAT (Computer Aided Tuning)

CAT is what allows an application to communicate with the radio's VFO, setting and reading frequencies and modes. Almost all Amateur radios (excluding the new LAN based radios) operate CAT communication over a very old RS-232 protocol - even if the radio is using a modern USB interface, the protocol is still 60 year old RS-232 over USB. Unlike modern self-configuring devices the setup parameters found in the Radio's menus must match the settings in the application preferences exactly. This can be challenging to get right the first time but the application should remember the settings for you after that.

Since most older radios have old style TTL or RS-232 connections for this channel and most computers have abandoned these old style serial ports, we need to add a USB-to-Serial adapter to the computer. This is usually a simple piece of hardware (UART) accompanied by a Mac software driver that allows the application to 'see' the radio connected to this device. The device may also include level converters to convert the RS-232 to the TTL level required by the (older) radio and sometimes DTR and RTS lines to also let the computer key the radio's PTT and CW lines.

Some devices combine the above capabilities with digital CW generators and or sound cards (modems) for the Audio channel.

Some radios have the USB/Serial adapters built in and only require a USB cable connecting them to the computer but still require a Mac driver to be installed.

Audio (Digital Communications Modes)

The audio channel allows the computer to send pre-recorded speech or digitally encoded information (RTTY, PSK etc.) to the radio's microphone or accessory jack as well as receive digitally encoded data from the radio's headphone or accessory jack for decoding. Some radios have this sound card capability built into the radio and it can be accessed over the same USB cable as the CAT channel. Sound cards on the Mac do not normally require a driver to be installed and can be configured in the Mac System Preferences Sound panel.

How do I connect my computer to my radio ?

Which Driver do I need ?

If you don't see the USB/Serial adapter port connected to your radio in the Port popup (or all you see is a Bluetooth port) then it could be one of the following:

• The right driver (kernel extension) is not installed.
• A bad or loose cable from the adapter/radio to your computer.
• A radio with an internal USB/Serial adapter (UART) and the radio is powered down.

You can tell which chip set is being used in your adapter/radio by selecting 'About This Mac / Overview / System Report / Hardware / USB. If the UART shows up in the Hardware/USB report It means that it is plugged in and powered up - not that a driver is necessarily loaded. Once you have identified the UART Chip set (FTDI, Silicon Labs, Prolific, Keyspan/Tripplite, RT Systems etc.) you can download and install the Mac driver from the manufacturers web site.

Where can I get a Mac driver for my ICOM IC-705, IC-7100, IC-7200, IC-7300, IC-7600, IC-7610, IC-7850, IC-9100, IC-9700, PCR2500, Kenwood TS-890S, TS-990S, TS-590S, Elecraft KX3, K3S, Yaesu FTdx101, FTdx3000, FT-891, FT-991 or Ten-Tec Eagle USB direct connect built in USB/Serial adapter ?

The USB/UART Bridge chip inside the Icom, Yaesu and Kenwood radios is a Silicon Labs USB to UART Bridge Controller and the Mac drivers are available here.

The USB/UART Bridge chip inside the Eagle, K3S and KX3 is an FTDI USB to UART Bridge Controller and the Mac drivers are available here.

Note: macOS built in FTDI driver: Supports FTDI based devices with standard VID/PID combinations.

'Since 10.9 (Mavericks), OS X has included built-in partial support for some FTDI devices in VCP mode. Starting with 10.11 (El Capitan), Apple’s own driver seems to be sufficiently comprehensive that many customers will not need to install FTDI’s own VCP unless they wish to use its advanced features such as baud-rate aliasing and configurable latency times' .

What if the radio doesn't show up in the Port popup?

• If you haveParallelsrunning on your Mac - make sure it hasn't 'stolen' the port.
• macOS High Sierra 10.13 introduces a new feature that requires user approval before loading new third-party kernel extensions.
• You may also need to reboot your Mac after the install.

You can tell which driver is installed and loaded by selecting 'About This Mac / Overview / System Report / Software / Extensions. and looking for the kernel extension that matches the adapter chip set (eg FTDI, Silicon Labs, Prolific etc.) It’s important that the driver is Loadable and Signed. It will only show as Loaded when the device is powered up and plugged in.

Make sure you have the correct version of the driver installed for your version of macOS - for example, the latest Silicon Labs driver will not work with macOS 10.9 or 10.10 and you need to install their legacy driver.

Don’t forget that the System Report does not automatically refresh and can take up to a minute to display all the extensions. If you want to see if a change you made (plugging/unplugging/changing usb ports etc.) has caused the driver to load then you have to go through the system report steps again - or run the application and look at the debug log for the loaded driver.

Radio still not showing up ?

1. Unplug the radio from the computer.
2. Install the driver again.
3. Reboot the Mac (sometimes, more than a reboot - a power cycle of the USB Serial port is required).
4. Power up the radio and plug it in to the USB port.

Other things to try...

• In rare cases with older adapters some people have had to insert an older USB 2.0 hub inline with the radio.
• Reset the SMC https://osxdaily.com/2015/08/09/mac-usb-ports-not-working-fix
  

Installing Drivers on High Sierra, Mojave, Catalina and Big Sur

Drivers (kernel extensions) can be tricky to install on High Sierra (and later) if you are doing it for the first time, but if you want to communicate with your radio using MacLoggerDX, MacDoppler or any other Ham Radio software you will need to install the driver supplied by the manufacturer of the UART in your radio or radio adapter. It is not possible for MacLoggerDX or MacDoppler to do this for you.

Note: macOS built in FTDI driver:
'Since 10.9 (Mavericks), OS X has included built-in partial support for some FTDI devices in VCP mode. Starting with 10.11 (El Capitan), Apple’s own driver seems to be sufficiently comprehensive that many customers will not need to install FTDI’s own VCP unless they wish to use its advanced features such as baud-rate aliasing and configurable latency times' .

Starting with OS X Mavericks, Apple has been making changes to how third party kernel extensions are allowed to work. On macOS High SIerra and later, kernel extensions must be digitally signed using an Apple Developer ID and installed into /Library/Extensions enforced by System Integrity Protection. Kernel extensions will not load unless authorized to do so by a logged-in user.

User-Approved Kernel Extension Loading

macOS High Sierra 10.13 introduces a new feature that requires user approval before loading new third-party kernel extensions. (Approval is automatically granted to third-party KEXTs that were already present when upgrading to macOS High Sierra).

When a request is made to load a KEXT that the user has not yet approved, the load request is denied and macOS presents this alert.

This prompts the user to approve the KEXT in System Preferences / Security & Privacy / General.
You will have to enter your credentials after clicking the lock in the lower left corner to enable the Allow button.

This approval UI is only present in the Security & Privacy preferences pane for 30 minutes after the alert. Until the user approves the KEXT, future load attempts will cause the approval UI to reappear but will not trigger another user alert..

Once approved, the KEXT will immediately be loaded or added to the prelinked kernel cache, depending on what action was blocked. Subsequent requests to load the KEXT will proceed silently as on previous macOS versions.

Apple Technical Note TN2459

Big Sur

I’m a Mac user since many years, and I always used MacBook Pro notebooks only. I never had any problems to find good alternatives to each Windows software I was using before, even the less common ones. And just as a last resort, there is always a Virtual Machine (XP before, now 7) running inside VMware Fusion.

For the hardware part however, problems has always been a little bit worse. Even if I always checked Apple compatibility before buying any new piece of hardware (especially printers) there has been situations where I was not able to solve my problems. Console cables for connecting to network appliances like switches or routers has been my main problem.

Those console cables usually have an RJ45 jack towards the network appliance, and an RS232 jack towards the computer. But in the last 7 years, since I had my first Mac, I’ve never seen an Apple notebook with a serial cable. There are many Serial-to-USB adapters, but there are few drivers for OS X. Or at leat, until my last small discovery few days ago.

One of my colleagues, working primarily as a Network Administrator, uses a Ubuntu Linux notebook, and he owns this adapter:

Has many adapters of its kind, they have no visible brand or information to read. My colleague told me he got this one many years ago in a electric fornitures shop. It is automatically recognized and mounted by Linux kernel, and this is enough for him. I tried to connect it to my Mac OS X but it was not recognized, as you can see:

The only serial ports available are those created by the Bluetooth antenna, even if the adapter is correctly identified by the USB internal hub. This command

in fact lists all the available USB devices, and also the adapter is listed:

Anyway, I found this great post, and I followed it from beginning to end. Once I completed the steps, I run again the shell command:

The last line is the Serial-to-USB adapter. You can double-check that is the adapter by plugging it out and in and repeating the ls command, you will see it appearing and disappearing. Once I identified the adapter and I loaded its driver, I downloaded ZTerm to use it. You need to configure the program in this way:

Go to Settings -> Modem Preferences… and select the adapter as the default modem. Then, go to Settings -> Connections and you will find a screen like this one:

Cable Car Chaos Mac Os Catalina

Now you will have to change the parameters as needed, depending on the appliance you need to connect to. Hitting OK, you should see the console:

Cable Car Chaos Mac Os X

In my example, it’s a pfSense installation in a Soekris Net4511.

Cable Car Chaos Mac Os Update

So, at the end even a Network Administrator can use a modern and fashionable Mac, instead of those old and ugly Windows XP notebooks with a serial port 🙂