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Overview  | Platforms  | Quick Start  | Windows   OSX   Linux   Raspberry Pi   Android

This gives detailed installation instructions for OSX.

To start with, you may install either the Base system (without the Qt IDE) or the All-in-One system (with the Qt IDE).

The default installation folder is under the user's Applications folder, e.g.


For a shared installation, you may install in the /Applications folder. This requires admin privilege, and will also require admin privilege for updates.

Base System Using Jconsole

  • download the installation file:
  • Go to Finder
    • Navigate to your Downloads folder
    • Double-click the downloaded installation file. This will create the folder j64-804
    • Drag the new j64-804 folder and drop on /Users/Fred
    • Navigate to /Users/Fred/j64-804/bin
    • Right-click jconsole to get a menu of options
    • select Open. Now:
      • If message box '...unidentified developer...' has an Open button, press it. This will start jconsole.
      • otherwise, your version of OSX has extra file attributes and your must remove the quarantine attribute from jconsole:
        • Run Finder>Applications>Utilities>Terminal to start a terminal window
        • In the terminal window, execute the line:
          xattr -d 64-804/bin/jconsole
        • In Finder, double-click jconsole to start it.
  • (optional) install all addons, install Jqt ide, and create desktop launch icons. Run the following lines one at a time in the jconsole window:
   load '~addons/ide/jhs/installer.ijs'
   installer 0
   exit 0

After you install the base system, install any addons you want.

If later on you want to install the Qt IDE, then load J console and run:

   install 'qtide'

All-In-One System

Download the All-in-One Installer:

Double-click the dmg file and move the j64-804 folder to your Applications folder or to the /Applications folder.

Double-click the green J icon in the j64-804 folder to start Jqt.

Continue with the next section to install any addons you want.

(optional) Install Addons

To install or update any addons, do one of the following:

1. in Jqt, select Tools|Package Manager from the menu, select the addons to be installed (or Select All to get them all), and press Install.

2. in the J console, use the Package Manager console interface.

(optional) Change Default Folder Names

J needs directories to store temporary files, configuration files and so on. By default these are in a folder under the User's home folder, named like:


To change the folders J uses, follow the instructions here.