I need to run Eclipse Kepler on Mac OS through a JDK 1.7 (This is required by the PyDev plugin).
The problem is that although I have managed to install the 1.7 jdk a
Just for those who may have been stuck after doing both tasks described above and still seeing the same error message: I was certain that I had downloaded 64-bit Eclipse, but it turns out I had the 32-bit version. After downloading 64-bit, everything worked!
I had a perfectly working Eclipse Luna, and started getting this error while trying to upgrade to Java 8 (and updating jre, jdk etc). Shan's solution didn't work for me. So I just downloaded and installed latest Eclipse. It's working fine. Saves the time of debugging and fiddling around.
Right click on the Eclipse icon and select 'show package contents'. Inside the contents directory you'll find a file called 'Info.plist'. Scroll down to the bottom of the file till you find this
<key>Eclipse</key>
<array>
<!-- to use a specific Java version (instead of the platform's default) uncomment one of the following options,
or add a VM found via $/usr/libexec/java_home -V
<string>-vm</string><string>/Library/Java/JavaVirtualMachines/jdk1.8.0_20.jdk/Contents/Home/bin/java</string>
<string>-vm</string><string>/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Commands/java</string>
-->
Notice the commented out section. Move the jdk path declaration out of the comments section. It should look like this now.
<key>Eclipse</key>
<array>
<string>-vm</string><string>/Library/Java/JavaVirtualMachines/jdk1.8.0_20.jdk/Contents/Home/bin/java</string>
<!-- to use a specific Java version (instead of the platform's default) uncomment one of the following options,
or add a VM found via $/usr/libexec/java_home -V
<string>-vm</string><string>/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Commands/java</string>
-->
Last step, browse to /Library/Java/JavaVirtualMachines and check the jdk package name present there. Replace the jdk version in the above command with that.
/Library/Java/JavaVirtualMachines/{your_jdk_package_name}/Contents/Home/bin/java
Optional: On some machines you may have to close the finder after you've done all this, navigate to the eclipse folder and click on eclipse again for it to work.