BatChmod for Mac

BatChmod for Mac is a utility for manipulating file and folder privileges in Mac OS X. It allows the manipulation of ownership as well as the privileges associated to the Owner, Group or others. It can also unlock files in order to apply those privileges and finally, it can remove any ACLs added to a folder or file under Mac OS X 10.5 Leopard or better.

Unlock what is rightfully yours
BatChmod can also give you back access to locked files, folders or disks. If something is locked, it can unlock it. If you no longer have permissions to files or folders, change the permissions back. Sometimes, a whole hard disk can become inaccessible or locked and often, BatChmod can unlock those too!
If you moved a folder or files from another machine or another user on your machine, BatChmod can help set you up as their rightful owner.

Keep your Trash clean
Ah the beauty of a nice clean Trashcan on your Desktop. How annoying when you cannot empty it because some files are thought to be in use by the Finder! BatChmod offers a nice "Force Empty Trash" menu when you click on its icon or when you go to the BatChmod Menu when you run it. Quick and simple and you will never see those files again.