“The idea with JS8Call is to take the robustness of FT8 mode and layer on a messaging and network protocol for weak signal communication on HF with a keyboard-to-keyboard interface. JS8Call is heavily inspired by WSJT-X, Fldigi, and FSQCall and would not exist without the hard work and dedication of the many developers in the amateur radio community.”

need help?

The JS8Call Guides and §tutorials are being updated for the new version of js8call.

In the mean time you can find the full documentation here,

alternatively please contact us and we will do our best to help, or you can join us on groups.io where there are thousands of other users who are ready to answer your question

Installation Guides


How do I install JS8Call on my Mac?
Firstly download the installation package from the download link.

Once downloaded open a finder window and go to where the file was downloaded to (Usually “Downloads”)

Double Click on this file and it will open the terms and conditions. Click Agree to continue

This will open a finder view of the installation package

If you have not installed JS8Call or WSJT-X before you will need configure some shared memory, if you have installed and successfully run either application you can skip this step. (Please read the ReadMe.txt file for ,more info – this is just a quick start guide)

First Drag the file named sysctl.conf from the installation package window to your Mac Desktop

Next you will need to open a terminal window and enter some commands

To do this, open Launchpad and in the find box type terminal and press enter.


now you need to enter the commands that are in the ReadMe file. Enter them exactly or it won’t work correctly.

sudo cp $HOME/Desktop/sysctl.conf /etc/

sudo chmod 664 /etc/sysctl.conf

sudo chown root:wheel /etc/sysctl.conf

Now you need to restart your Mac for the changes to take effect.

Once you have restarted then open a terminal window and enter

sysctl -a | grep sysv.shm

shmmax 14680064, if not then please refer to the ReadMe.

Now all that’s left to do is to Open the insallation package again and drag the JS8Call icon to your Applications folder

This will copy the app to your Mac and you will be able to find it in your Applications Directory in finder.


Video Tutorials

JS8Call Version 2 Fast and Turbo Modes

How To send you location to the APRS Network
One of the great new features of JS8Call is the ability to send messages to the APRS network. For most messages you need to know the correct way to format the message, sending your position is built into JS8Call and is very easy to do, Julian shows us how in this tutorial video on the official JS8Call youtube channel.

Beacon FAQ & How To

How to Download the JS8Call software

Simple, just click the button to go to the downloads page!