1 2 Previous Next 22 Replies Latest reply: Feb 4, 2013 9:23 PM by MadMacs0
mindyann Level 1 Level 1 (0 points)

Can I run Java 1.6 on my Mac with Lion installed? Everything I have read says that 1.7 is for Lion. The problem is that with the grading software my school district runs, Java 1.7 is not compatible. I am trying to get a friend's Macbook to run the grading program.  I know that my desktop Mac running Lion will work.  Where can I find which version of Java is installed on my computer so that I can mimic the same setup on his computer.  Thanks in advance.

  • 1. Re: java question
    Kappy Level 10 Level 10 (226,775 points)

    Open Terminal in the Utilities folder and enter at the prompt:

     

    java -version

     

    Press RETURN.

  • 2. Re: java question
    MadMacs0 Level 4 Level 4 (3,735 points)

    Kappy's suggestion will only tell about one version version, probably Apple's Java 6. If you go to System Preferences and find a Java icon, then you have Java 7 installed. It is possible that you have both or neither installed.

  • 3. Re: java question
    mindyann Level 1 Level 1 (0 points)

    Terminal said Java 6 and there was no Java icon in System Preferences.  Now to see if the Grading System will load.  Guess I'll try restarting again. Thanks.

  • 4. Re: java question
    mindyann Level 1 Level 1 (0 points)

    I restarted and it wouldn't pick up the grading system.  Is there some cache or some other file that I need to clear? What are your suggestions?  Thanks.

  • 5. Re: java question
    MadMacs0 Level 4 Level 4 (3,735 points)

    mindyann wrote:

     

    I restarted and it wouldn't pick up the grading system.

    Open Java Preferences (found in /Applications/Utilities/)

    Java Preferences 1.6.0_39.png

    and make sure both of the checkboxes in the lower pane are checked.

     

    As I understand it, your grading system is application based and doesn't involve a browser plug-in, so it should not be necessary to check the box at the top of the window for that.

     

    The Network tab is the place to empty your cache with the "Delete Files..." button.

  • 6. Re: java question
    mindyann Level 1 Level 1 (0 points)

    I don't have a java preferences in the utilities folder. The grading system is run off of the district internet website.  Does that complicate things?

  • 8. Re: java question
    MadMacs0 Level 4 Level 4 (3,735 points)

    mindyann wrote:

     

    I don't have a java preferences in the utilities folder.

    Sorry, I'll blame it on not having had my first cup of coffee yet. I forgot you said you were running Lion.

     

    Unfortunately Apple disabled Java 6 for Safari and has not announced plans to upgrade it for Lion / Mountain Lion users.

     

    About the only thing I can suggest is to use Firefox and agree to ignore the warning it posts each time you access a Java based web site. The 1.6.0_37 version of Java has at least 30 unpatched vulnerabilities, so it's important to only use it with trusted web sites.

     

    I read elsewhere that this has shut down access to all the banking web sites in Denmark for Lion and Mountain Lion users and that has prompted the government there to pressure Apple to do something about it.

     

    I would recommend giving them your own feedback at http://www.apple.com/feedback/macosx.html.

  • 9. Re: java question
    MadMacs0 Level 4 Level 4 (3,735 points)

    mindyann doesn't have Java 7 installed so that's not needed in her case.

  • 10. Re: java question
    baltwo Level 9 Level 9 (60,115 points)

    Sorry, but since she noted that the Java Preferences app was missing, I assumed she or her friend installed it. However, if that's missing and she wants to mimic her machine running Lion w/Java 7, then she should install the latest Java 7 update on her friend's machine: http://docs.oracle.com/javase/7/docs/webnotes/install/mac/mac-jre.html

  • 11. Re: java question
    MadMacs0 Level 4 Level 4 (3,735 points)

    baltwo wrote:

     

    if...she wants to mimic her machine running Lion w/Java 7, then she should install the latest Java 7 update on her friend's machine:

    The grading software she needs to run off the school districts web site is not compatible with Java 7, so she wants to be able to run Java 6 in a browser from her Lion iMac.

  • 12. Re: java question
    baltwo Level 9 Level 9 (60,115 points)

    The problem is that with the grading software my school district runs, Java 1.7 is not compatible.…I know that my desktop Mac running Lion will work.  Where can I find which version of Java is installed on my computer so that I can mimic the same setup on his computer.

     

    And that's why I posted on how to reinstall/install Java 6, since that's what I assumed she was running.

  • 13. Re: java question
    MadMacs0 Level 4 Level 4 (3,735 points)

    baltwo wrote:

     

    And that's why I posted on how to reinstall/install Java 6, since that's what I assumed she was running.

    Yes, she said that java -version told her she had some version of Java 6 (probably 1.6.0_37 if she has the October update) and had no Java in System Preferences.

     

    But I don't see anything in the reference you gave about reinstall/install Java 6, only reverting the plug-in after installing Java 7? If she never installed Java 7 then there shoud be no need to revert.

  • 14. Re: java question
    baltwo Level 9 Level 9 (60,115 points)

    I assumed that since both machines were running Lion, her friend installed Java 7. The only solution is to reinstall the latest Java 6 for Lion update and see if that fixes the issue.

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