Since DAEMON Tools for Mac 5.1, you can create a physical copy of an optical disc. Clone a disc wizard is a part of Disc Burn paid group.
To start cloning, click 
icon on the sidebar and perform the following steps:
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Insert the disc you want to clone and a blank disc to physical drives and choose them. You can use the same drive for both options. In this case, you will need to insert a blank disc after the temp copy of the source disc is created.
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Check Copy on the fly option if you don't want to create image of the source disc. If you have only one drive, this option is unavailable.
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Check Finalize option if you do not plan to burn something to the destination disc later.
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Check Erase disc before burning if the destination disc is rewritable and is not blank. The data will be fully erased from it.
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Click Clone. Wait a few seconds while the disc is being cloned. You can follow the progress in the main window or from the icon in Dock menu. Once the task is finished, you will get a message in Notification Center.