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I've been trying to get a clear story regarding the interaction of these three components before upgrading my system from Lion to Mavericks --- I can't afford a Mathematica disaster.

What I think is the case is: 1. Upgrading to Mavericks removes Java from the system (or perhaps installs Java 7). 2. MMA 9 requires Java 6, and the MMA installer gives you an option to install (downgrade?) to Java 6. 3. Once you have Java 6 installed, MMA works fine.

Does that sound correct? Does Wolfram indeed support MMA 9 on Mavericks?

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Yes, v9 works fine on Mavericks. The steps you describe are what's necessary. –  rm -rf Feb 27 at 22:01
1  
You don't need to bother with Java at all. Apple provides Java 6, and this is what Mathematica uses. When I upgraded to Mavericks, Apple Java 6 was automatically removed. Mathematica was one of the first programs I started up afterwards. The OS automatically prompted me to install Apple Java 6, and after a click of a single button and a few minutes to download it, everything was working perfectly. –  Szabolcs Feb 27 at 22:04
    
This article explains Java on Mavericks: support.wolfram.com/kb/12098 –  KAI Feb 27 at 23:58

1 Answer 1

up vote 3 down vote accepted

I can only agree with Szabolcs comment. Upgrading to Mavericks brought a lot of problems, but Mathematica worked from the first minute. Therefore, let me cite the comment into an answer:

You don't need to bother with Java at all. Apple provides Java 6, and this is what Mathematica uses. When I upgraded to Mavericks, Apple Java 6 was automatically removed. Mathematica was one of the first programs I started up afterwards. The OS automatically prompted me to install Apple Java 6, and after a click of a single button and a few minutes to download it, everything was working perfectly.

And here is the link to an official Woflram article which KAI posted:

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It all worked as advertised. Thanks for the help, all. –  rogerl Feb 28 at 16:47

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