OS X Installation

These instructions are for installing Lasso Server on OS X. An Intel-based Mac running OS X 10.5 or later is required.

OS X Prerequisites

  • Lasso’s PDF functions require a Java runtime, which is not included with OS X 10.7 and later. The latest version of Apple’s “Java for OS X” can be downloaded from the Apple support site.
  • Lasso’s image functions require X11, which is not included with OS X 10.8 and later. For those systems, install XQuartz instead.


  1. Download and expand the Lasso Server for OS X installer from the LassoSoft website.

  2. Run the installer to perform a standard installation, which will install Lasso Server and start or restart the system’s Apache. By default the following files and folders will be installed:

    Apache config:
    • /etc/apache2/other/mod_lasso9.10.5.conf (OS X 10.5)
    • /etc/apache2/sites/mod_lasso9.10.5.conf (OS X Server 10.5)
    • /etc/apache2/other/mod_lasso9.conf (OS X 10.6 and later)
    • /etc/apache2/sites/mod_lasso9.conf (OS X Server 10.6 and Server 10.7)
    • /Library/Server/Web/Config/apache2/sites/mod_lasso9.conf (OS X Server 10.8 and later)
    Apache plugin:
    • /usr/libexec/apache2/mod_lasso9.10.5.so (OS X 10.5)
    • /usr/libexec/apache2/mod_lasso9.so (OS X 10.6 and later)
    shared library:
    • /Library/Frameworks/Lasso9.framework
    launchd item:
    • /Library/LaunchDaemons/com.lassosoft.lassoinstancemanager.plist
    • /usr/bin/lasso9
    • /usr/bin/lassoc
    • /usr/sbin/lassoim
    • /usr/sbin/lassoserver
    user data:
    • /var/lasso
  3. When the installer has finished, click on the link on the web page that appears in order to load the initialization form (found on your own machine at http://localhost/lasso9/instancemanager) and complete your Lasso installation.

From here on, you can read up on using the Lasso Instance Manager and Instance Administration and Configuration interfaces.


On OS X Server, verify that the Web or Websites service is running in Server Preferences or Server.app.


If you upgrade your OS X installation or install OS X Server after installing Lasso Server, you will need to either manually move the Apache conf file and plugin for Lasso to continue running, or simply reinstall Lasso to place the files in the correct locations.