Run and manage a node on macOS

This guide describes how to run and manage a node on macOS. You can also run a node using Docker for Linux distributions, Ubuntu, or Windows.


Currently, running a node on macOS is only supported on the testnet.


Install and run a node

  1. Go to Downloads, and download the latest macOS installer package (.pkg file).

  2. In the folder where you downloaded the .pkg file, double-click the .pkg file. This will open the Install Concordium Node program.

  3. Click Allow to the message saying This package will run a program to determine if the software can be installed. If you have an M1 based Mac, the installer may ask you to install Rosetta, if you haven’t already. Click Install if that’s the case.

  4. If you already have a version of the node installed, click OK to the message saying Previous Installation Detected.

  5. Click Continue on the Introduction page.

  6. Click Continue on the License page, and then Agree to accept the license agreement.

  7. On the Configuration page you have the following options for both a mainnet and testnet node.

    • Run a [mainnet/testnet] node at start-up: When selected, the node runs when the system starts. Choose this option when you plan to use the node frequently and need it to be up-to-date at short notice. If you don’t select this option, you’ll have to start the node manually when required, for example, when you want to use the Desktop Wallet or concordium-client. If you choose to start the node manually, it might take longer for the node to get up-to-date with the blockchain depending on when the node was last up-to-date.

    • Start the node after installation is complete: The node will automatically start running after the installation is complete. Do not choose this option if you want to make further configuration changes before starting the node.

    • Report to the network dashboard: Select this option if you want to publish your node statistics to the relevant dashboard when the node is running. E.g. for testnet.

    • Public node name: Specify the name of your node as you want it to appear on the network dashboard if the node reports to the network dashboard. NB: You must enter a name for both nodes, even if you only want to run one of them.

  8. Once configured, click Continue to go to the Installation Type page.

  9. Click Install and enter your administrator password. The installer needs the password because it installs the node for all users and runs it as a system service.

  10. Once installed, click Close. The following helper-applications are now available on your computer (you can view them in the LaunchPad or in the /Applications/Concordium Node folder):

    • Concordium Node Start Mainnet

    • Concordium Node Stop Mainnet

    • Concordium Node Start Testnet

    • Concordium Node Stop Testnet

Verify that the node is running

The node runs as a background service with no user interface. To verify that it’s running, use the Activity Monitor.

  1. Open the Activity Monitor application from the LaunchPad.

  2. Look at the list and verify that the following is running:

    • concordium-node for each node you are running. For example, if you’re running a node on both testnet and mainnet, you’ll see two instances of concordium-node.

    • node-collector for each node that reports to a network dashboard.

  3. If the node is running properly and reporting to the network dashboard, you can see it on the dashboard:

Connect a node to the Desktop Wallet

You can also verify that a node is running by connecting it to the Desktop Wallet.

  1. In the Desktop Wallet, go to Settings, and then select Node settings.

  2. For the testnet version of the Desktop Wallet, you must connect to a testnet node. In the Address field, enter and in the Port field enter 10001.

  3. Select Set connection. If the connection works and the node is running properly, there’s a message saying Successfully connected.

Change the node startup settings

If you want to change whether the node services start automatically, you have two options.

  • If you’re not familiar with using a terminal, the easiest option is to reinstall the macOS node and configure it differently.

  • If you’re familiar with using a terminal, the following options are available:

    • Text prefixed with a $ is to be run in a terminal.

    • Enable automatic startup of the node by running:

    $ sudo ln -s "/Library/Concordium Node/LaunchDaemons/software.concordium.testnet.node.plist" "/Library/LaunchDaemons/"
    • Enable automatic startup of the node-collector by running:

    $sudo ln -s "/Library/Concordium Node/LaunchDaemons/software.concordium.testnet.node-collector.plist" "/Library/LaunchDaemons/"
    • Disable automatic startup of node by running:

    $sudo rm "/Library/LaunchDaemons/software.concordium.testnet.node.plist"
    • Disable automatic startup of node-collector by running:

    $sudo rm "/Library/LaunchDaemons/software.concordium.testnet.node-collector.plist"

Configure a node as a baker

To run a node as baker, you first have to generate baker keys in the desktop wallet and then register the keys on an account. For more information, see, Add a baker account in the Desktop Wallet. You then have to change the service file for the Concordium Node.

  1. Edit this file as an administrator: /Library/Concordium Node/LaunchDaemons/software.concordium.testnet.node.plist

  2. In the EnviromentVariables section of the file add the following:

    <!-- Path to the baker credentials file. -->
  3. Replace /full/path/to/baker-credentials.json with the full path to the baker credentials files.

  4. Restart your node by running Concordium Node Stop Testnet (if running) and then Concordium Node Start Testnet.

View node logs

There are two ways to view the logs:

  • With you can start recording logs and view them, but you can’t see logs from the past.

    • Open the application Console*, click on the Start button to begin recording logs.

    • In the search bar, enter software.concordium.testnet.node and press enter.

    • Then click on the small Any button in the search bar and select Subsystem from the list of options.

  • With a terminal and log show you can view logs from the past and as they are logged.

    • Open a terminal.

    • Enter log show --predicate 'subsystem == "software.concordium.testnet.node"'

    • You can filter the logs with additional parameters, such as start and end date. Enter log show --help to see the parameters available.

Synchronize a node with the network

When you start a node for the first time, it can take a while to synchronize the node with the rest of the network, since it has to get all blocks from its peers.

You can improve the performance by downloading the blocks before starting the node. While it will still take time to process the blocks, it will typically be faster than requesting them from peers.

Download the file with the blocks from the following addresses:

The file is downloaded to your default download location.

  1. Move the file to the node’s data folder:

    sudo cp "/Users/<username>/Downloads/blocks_to_import.mdb" "/Library/Application Support/Concordium Node/Testnet/Data"

    (replacing <username> with your actual username).

  2. Edit this service file as an administrator: /Library/Concordium Node/LaunchDaemons/software.concordium.testnet.node.plist

  3. In the EnviromentVariables section of the file add the following:

    <string>/Library/Application Support/Concordium Node/Testnet/Data/blocks_to_import.mdb</string>
  4. Restart your node by running the application Concordium Node Stop Testnet (if running) and then Concordium Node Start Testnet.

  5. Open the service file again, remove the lines you just added, and then save the file. This ensures that these blocks will not be processed again the next time the node is restarted.

  6. Go to the testnet dashboard to monitor when the node has caught up with its peers on the blockchain. You do so by comparing the finalized length of the chain with the length of your node. If they match, your node has caught up.

Uninstall a macOS node

  1. Open Spotlight Search by pressing Cmd + Space on your keyboard, or by clicking the search icon in menu bar.

  2. Search for Concordium Node Uninstaller and open the found application.

  3. You now have two options:

    • To delete the node and keep the data and keys, click Yes.

    • To delete the node as well as data and keys, click Yes, and delete data. (Make sure to back up your keys beforehand).

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