If you're asked whether you want to open it, of course you do click Open. The Apple Java for OS X 2012-006 1.0 update for Mac OS X 10.7, 10.8 operating systems delivers improved security, reliability, and compatibility by uninstalling the Apple-provided Java applet plug. You'll see an item named Eclipse if you like, drag its icon into the dock so that you'll be able to launch Eclipse easily. Open your Applications folder, and then open the eclipse folder. This package is exclusively intended for support of legacy software and installs.
Extract the ' Minecraft.jar ', double click to start, and answer a few security questions. Now head back to and download the Linux version of Minecraft.
Instead head to Oracle's website and install Java 8.
If asked, click on "Open with Archive Utility (default)" and then click OK. Here are two easy answers: (1) Don't install Java 6 (the old version from Apple).