The loading-icon also known as Spinning pinwheel was located in an old Mac version at the following location:
/Library/Frameworks/OpenBaseManager.framework/Versions/A/Resources/gear.tif
In Mavericks, this location does not exist. Where (if not renamed by Apple to something weird) is this file located in Mavericks? I've checked ~/Library but it cannot find the gear.tif it used to be in the past.
Best Answer
Here is one
It is called the Wait Cursor :)
/System/Library/Frameworks/GLUT.framework/Versions/A/Resources
You can help looking for it, it does belong to the Cursor category.