NoMachine 6.12.3 now available for download

Added on: 2020-09-29 Last Modified: 2020-09-29
ID: SU09R00211  

Luxembourg, September 29th, 2020

NoMachine makes available today a minor software update aimed at solving issues affecting the previous release such as white screen when connecting to a remote physical display with VP8 encoding and web session disconnections on Safari 13.1.1. This release also provides the possibility to use Kerberos Heimdal libraries on the server side and other enhancements.

The full list of fixes and implementations available in version 6.12.3 is:

TR06R09763 - "No available sessions" message occurs on mac OS
TR12N07463 - Allow to save the username when connecting with a private key without passphrase
TR07R09803 - Cannot remove lock file '/tmp/.X...-lock': Operation not permitted
TR06R09747 - Cannot run NoMachine sessions on ARMv7 devices with kernel 5.4.42 or later
TR07R09808 - Chrome bookmarks bar takes a few seconds to open on local when a NoMachine custom session is running
TR07R09789 - Connecting a new web session terminates the previous ones
TR06R09781 - Ctrl key is locked on when right-ctrl is the first keypress in a virtual desktop
TR06R09745 - F13 - F24 keys from extended keyboards are not mapped into the NoMachine session
TR07R09800 - Inconsistent behaviour about trimming domain information from AD username
TR07R09788 - Java throws a NullPointerException in a NoMachine custom session
TR06R09780 - NoMachine server log reports 'Argument "MANUAL" isn't numeric'
TR06R09770 - NumLock is not synchronized when connected to Linux physical displays
TR07R09785 - The web session is disconnected in Safari v. 13.1.1 after some minutes
TR05R09697 - Users cannot connect to the Cloud Server, after that a failover occurred
TR06R09746 - White screen occurs when macOS is rebooted just after the installation of NoMachine
TR06R09772 - White screen is displayed when connecting to a remote physical display (VP8 encoding)
TR06R09760 - Value of ClientConnectionMethods key is not preserved during the update

FR09R04023 - Adding the --extended switch to the 'nxserver --servergrouplist' command
FR07R04004 - Advising users when the network connection has interruptions (for custom sessions)
FR09R04015 - Enabling debug log level for the already running 'nxserver --daemon' process
FR01R03912 - Providing server configuration keys for defining the Kerberos/GSSAPI library to be used
FR07R04008 - Re-delegating Kerberos tickets to NoMachine sessions connected by NX protocol
FR09R04025 - Updating the jQuery library used for web sessions to version 3.5.1
FR06R03993 - Add a new key in connection file to configure the '--exit' option


Supported Platforms

Windows 32-bit/64-bit XP/Vista/7/8/8.1/10

Windows Server 2008/2012/2016/2019

Mac OS X Intel 64-bit 10.7 to 10.15

Linux 32-bit and 64-bit

RHEL 4 to RHEL 8
SLED 10 to SLED 15
SLES 10 to SLES 15
openSUSE 10.x to openSUSE 15.x
Mandriva 2009 to Mandriva 2011
Fedora 10 to Fedora 32
Debian 4.0 to Debian 10
Ubuntu 8.04 to Ubuntu 20.04

Raspberry Pi 2/3/4 ARMv6/ARMv7/ARMv8


Important notices

All customers with version 4 or 5 installed are invited to read the following document available in the Knowledge Base for further information about what has changed and how to proceed with updating to version 6:


Download NoMachine Packages

You can download the latest packages suitable for your Operating System from the NoMachine Web site at the following URL:

Customers with valid subscriptions should log in to their customer area and download the "Production version".

Automatic updates

The automatic check for updates is scheduled to check our repositories every two days.

To update the free NoMachine package:

  • - Open the NoMachine User Interface from your Programs Menu.
  • - Click on 'Settings', then on the 'Server preferences' and finally on 'Updates'.
  • - Then click on the 'Check now' button.

To update the NoMachine Enterprise Client immediately:

  • - Click on 'Settings' and 'Updates'.
  • - Then click on the 'Check now' button.

More information about the check for automatic updates is available here:

Manual package update

Please follow the instructions to update your installation manually:

On Windows:

  • - Download and save the EXE file.
  • - Double click on the NoMachine executable file.
  • - As for the installation, the Setup Wizard will take you through all steps necessary for updating NoMachine.

On Mac OS X:

  • - Download and save the DMG file.
  • - Double-click on the Disk Image to open it and double-click on the NoMachine program icon.
  • - As for the installation, the Installer will take you through through all steps necessary for updating NoMachine.

On Linux:

You can use the graphical package manager provided by your Linux distribution or update NoMachine by command line by following instructions below. If you don't have the sudo utility installed, log on as superuser ("root") and run the commands without sudo.


  • - Download and save the RPM file.
  • - Update your NoMachine installation by running:
    • # rpm -Uvh <pkgName>_<pkgVersion>_<arch>.rpm


  • - Download and save the DEB file.
  • - Update your NoMachine installation by running:
    • $ sudo dpkg -i <pkgName>_<pkgVersion>_<arch>.deb


  • - Download and save the TAR.GZ file.
  • - Update your NoMachine installation by running:
    • $ cd /usr
    • $ sudo tar xvzf <pkgName>_<pkgVersion>_<arch>.tar.gz
    • $ sudo /usr/NX/nxserver --update
  • If you are installing Enterprise Client or Node run respectively:
    • $ sudo /usr/NX/nxclient --update
    • $ sudo /usr/NX/nxnode --update


Installation and configuration guides for the NoMachine products are available at:


The NoMachine Development Team