title: You cannot use this application with this Mac OS version
body: <p>My Mac OS X version is 10.10.1 Yosemite. I wanted to install Java 7 on my Mac. So when I try to install it says "you need Mac OS X version 10.7.3 and later". So I found the following from the web to solve this issue:</p>
  
  <p><a href="https://stackoverflow.com/questions/24787530/error-trying-to-installing-jdk8-u11-osx-10-10-yosemite">Error trying to installing JDK8 U11 OSX 10.10 Yosemite</a></p>
  
  <blockquote>
    <p>Solution to solve this</p>
    
    <p>We can temporary change the OSX version before installing de package.</p>
    
    <p>Change OSX version 10.10.1 to 10.9:</p>
  </blockquote>
  
  <pre><code>sudo sed -i '' 's/&gt;10.10&lt;/&gt;10.9&lt;/'/System/Library/CoreServices/SystemVersion.plist
  </code></pre>
  
  <blockquote>
    <p>Install Java and don't forget to change your JAVA_HOME to /Library/Java/JavaVirtualMachines/jdk1.8.0_11.jdk</p>
    
    <p>Restore OSX version</p>
  </blockquote>
  
  <pre><code>sudo sed -i '' 's/&gt;10.9&lt;/&gt;10.10.1&lt;/'/System/Library/CoreServices/SystemVersion.plist   
  </code></pre>
  
  <p>So my issue was solved when I tried this (please click on the link if you are not able to understand my Terminal commands). Everything was working fine and I have installed Java 7 also.</p>
  
  <p>After a day when I opened my computer again, all my applications in were locked. I can not open any application even Terminal. It says "You have OS X 10.9. This application requires 10.0 or later". Now I can't open Terminal to change OS version again. Please help me to change OS version again to unlock all my applications.</p>