FreeCAD can be installed on Mac OS X in one step using the Installer.
Mac OS X 10.9 Mavericks 64-bit
New Mac download link
This page describes the usage and features of the FreeCAD installer. It also includes uninstallation instructions. Once installed, you can get started!
The FreeCAD installer is provided as a app package (.app) enclosed in a disk image file.
You can download the latest installer from the Download page. After downloading the file, just mount the disk image, then drag it to the Application folder or a folder of your choice.
That's it.Just click on the app to launch FreeCAD. If you have this message "FreeCAD can't be open as it is from unidentified developer. " Open the folder (Application) and right click on the app then click open and accept to open the application.
There currently isn't an uninstaller for FreeCAD. To completely remove FreeCAD and all installed components, drag the following files and folders to the Trash: