I just brought a iMac and downloaded Gimp. I need the plug-in and the instruction where the "Batch Plug-in" is (a hyperlink would be a great help) and how to add it to Gimp.
Look here for DBP (david's batch processor)
After you have downloaded put it in the plugin directory.
...you might try the following website.
How do I add the Plug-ins to Gimp? Can someone give me step by step instruction or a link to a video that shows me how?
Look here point 3: http://registry.gimp.org/node/23868