Alfresco can be used for many aspects of Digital Asset Management, including image transformation. These instructions are written for someone using the Mac OS X operating system.
Install Alfresco 3.0b or greater.
Determine whether ImageMagick is installed
At the command line, type 'convert'. This is an ImageMagick utility. If it is not found, ImageMagick is at the very least not configured (but may be installed)
Check /usr/bin for the convert utility. If it exists there, ImageMagick is installed on your system. You may need to update your $PATH to include /usr/bin. If not, it is either elsewhere on your system or not installed.