Waiting for Java7 on Mac OS X 10.6.3 “Snow Leopard”

Somehow, it was a good decision to switch OpenChrom to Eclipse 3.7.1 (Indigo) and Java7 except of Mac 10.6.3 “Snow Leopard”. Why on earth do they not support Java7? I don’t know. But I was aware of, that I needed a quick workaround to make it running.

Hence, here’s my solution how to start RCP applications on Mac OS X using Java7:

First of all, create the folder “JavaVirtualMachines” in the directory “/Library/Java“. Unless it’s not created, you’re not able to install the Java7 Developer Preview.

user$ sudo mkdir /Library/Java/JavaVirtualMachines

You can choose between the JDK or JRE package. I took the JDK.

Install it by dragging it into the specified folder.

Now, we need to create a program specific launcher called “start.sh“, but you’re free to choose nearby any name you like. Therefore we dive into the application.app (in this case openchrom.app).

Create a file called “start.sh“.

The content of the starter “start.sh” depends on the specific settings of your RCP application. I took the settings from the application.ini file (in this case openchrom.ini).


export JAVA_HOME=/Library/Java/JavaVirtualMachines/1.7.0.jdk/Contents/Home

java \
-Xms128M \
-Xmx500M \
-Dosgi.install.area.readOnly \
-Dosgi.configuration.area=@user.home/.openchrom/0.6.0/OpenChrom/configuration \
-Dosgi.instance.area.default=@user.home/OpenChrom/workspace \
-Dsun.awt.xembedserver=true \
-XstartOnFirstThread -Dorg.eclipse.swt.internal.carbon.smallFonts \

Start the terminal and navigate to the “start.sh” script. It is necessary to set the executable bit once using “chmod a+x“. The RCP application can now be started by starting the script using “./start.sh“.

user$ cd Desktop/0.6.0-PREV/OpenChrom/openchrom.app/Contents/MacOS/
user$ chmod a+x start.sh
user$ ./start.sh

This tutorial presented a workaround for OpenChrom. But it is applicable in the same way for Eclipse and other RCP applications.


About Philip Wenig

Founder of OpenChrom
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5 Responses to Waiting for Java7 on Mac OS X 10.6.3 “Snow Leopard”

  1. Pingback: Waiting for Java7 on Mac OS X 10.6.3 “Snow... | Eclipse | Syngu

  2. Gregory says:

    Thank you for the tutorial, however I am having problems with an error, would you happen to know how to fix this? Thanks

    An error has occurred. See the log file

  3. eselmeister says:

    Hi Gregory,

    I can’t make a statement without having a view into the log file. Please use the contact form (http://www.openchrom.net/main/content/contact.php) to send me the content of the log file.

  4. Gregory says:

    Good day, I’ve sent an email through the contact form
    I included the log file

    I also found out how to fix the problem (by deleting the .openchrom folder in the users directory)
    However, I am still wondering why an error occurs after using the market place
    I hope the log file will help

    Thank you very much

  5. About Java says:

    nice post and thanks for sharing.. 🙂

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