Copying and pasting on the MAC is a lot like the PC!

The traditional method of "right click and copy" can be achieved simply by right clicking the link and press "copy" and pasting the link by pressing "paste." A problem many people have when using Macs for the first time is figuring how to right click!
On the trackpad: tap with two fingers (might need to be enabled in system settings)
On the mighty-mouse(actually not that mighty): tap the right side of the mouse (also might need to be activated in system preferences), it may look like one button but it actually senses where you are clicking!

Or use the macro for copy/paste much like windows. In windows it is ctrl+c (for copy) and ctrl+v (for paste). Whereas on a Mac it is command+c (for copy) and command+v (for paste). This also applies to most cross-platform macros. The command in macs takes place for ctrl in windows.