Follow the instructions below appropriate for the type of OS and Cayenne distribution that you have:

### Mac OS X

CayenneModeler.app comes as a part of the Mac distribution and is located at the root of the disk image.

### Windows OS

Windows distribution of Cayenne contains `CayenneModeler.exe` file in the `bin` directory. To start the Modeler doubleclick this file. Note that you still need a JDK version 1.4 or newer installed to be able to run the Modeler.

### Cross Platform Modeler (Linux or any other OS)

CayenneModeler is a regular Java application that can be run on JDK 1.4 or newer. It can be started in two different ways:

1. By running `cayenne-modeler.jar`:

    cd cayenne_distro_dir/lib/modeler
    java -jar cayenne-modeler.jar

2. Or by executing a startup script.

To use one of the scripts, first set the following environment variables:

- `JAVA_HOME` - should point to your JSDK 1.4 installation. It may already exist in the environment.
- `CAYENNE_HOME` (optional) - should point to the directory where your unpacked Cayenne (a directory named like `cayenne-[release-suffix]`). If `CAYENNE_HOME` is undefined, scripts will still work in most environments, guessing the right distribution location.

And then run the scripts:

Windows:

    %CAYENNE_HOME%\bin\modeler.bat

UNIX:

    $CAYENNE_HOME/bin/modeler.sh