Running VisIt on OS X
VisIt is used mostly in Unix environments. Starting VisIt with OS X is straightforward, but it works in a very different manner than a typical Mac user usually expects.
First download the Darwin binary. You will probably want to download the Darwin/i386 distribution to get the binaries for an Intel based Mac. Note that filename ends in .gz, that is, a compressed file using the gzip compression library. Some browsers on the Mac want to automatically decompress this file. Make sure that you save it intact to your desktop without decompressing it. Next, also download the visit-install installation script.
You will need to open the Mac Terminal application. This is located in Applications, Utilities, Terminal.app. When run, this application is the text shell at the heart of most Unix applications. Assuming you saved the VisIt binaries and visit-install script to your desktop, you can install using these UNIX commands. Be sure to type them exactly:
mkdir visit cd Desktop chmod 700 visit-install ./visit-install 1.12.0 darwin-i386 ~/visit
When prompted for a host config file, you can choose to not have one. You can also skip adding a default bank.
Now, let's put VisIt in your path (assuming your default shell is csh/tcsh). This means that you will be able to simply type visit from the Terminal command line in order to launch it. Open the file called /Users/myname/.cshrc and add the following line to the end of the file (be sure to replace myname with your login name):
set path=($path /Users/myname/visit/bin)
We recommend running VisIt from the command line of the Terminal application so open up Terminal.
Since you added VisIt to your path, you can simply type visit at the prompt to launch VisIt.