Installing Calcium on Apple's OS X is straightforward, as it's really just another unix-type system. Just open a Terminal window and follow these steps:
Note: you can find 'Terminal' in the "Utilities" folder, inside "Applications"

1. Change directories to the server's CGI location:

   $ cd /Library/WebServer/CGI-Executables

2. Download the installation package:

   $ curl -O http://www.brownbearsw.com/calcium/download/Calcium4_0_4.tar.gz

3. Unpackage the installation:

   $ tar zxvf Calcium4_0_4.tar.gz

4. Change file permissions so the web server can create and write the data files

   $ chown -R www CalciumDir40/data

   Or, if not logged in as root:

   $ sudo chown -R www CalciumDir40/data

   (and you'll need to enter your password when prompted)

http://localhost/cgi-bin/Calcium40.pl

See the Installation Tips page for more general information on installing Calcium.

Please see the Installed Files page for details on how your installation should look.