title: increase maximum representable size for java heap space over 6GB on MAC
body: <p>I'm working with an Model Checker on a Mac 10.6.8 64-Bit machine (32 GB Ram). My problem is that I can't reserve more than ~ 2 GB heap space. </p>
  
  <p>I tried for example this :</p>
  
  <pre><code>./mymodelchecker -vmargs -d64 -Xms6g -Xmx6g
  </code></pre>
  
  <p>But I get this error-message : </p>
  
  <pre><code>Invalid initial heap size: -Xms6g The specified size exceeds the maximum representable size.
  </code></pre>
  
  <p>It seems to me that he heap space is working in a 32-Bit environment, but the machine is 64-Bit, Java is through -d64 is in 64-Bit mode and my Model Checker supports 64-Bit architecture.</p>
  
  <p>How can I increase the maximum representable size of my heap space?</p>