Synchronous programming language. A synchronous programming language is a computer programming language optimized for programming reactive systems. Computer systems can be sorted in three main classes: transformational systems that take some inputs, process them, deliver their outputs, and terminate their execution; a typical example is a compiler; interactive systems that interact continuously with their environment, at their own speed; a typical example is the web; and reactive systems that interact continuously with their env
Open Disk Utility (Applications > Utilities). Select the DVD disc from the list on the left. You will notice that there are two DVD icons--select the one slightly indented (this is the DVD itself, whereas the first one is the drive). Click on New Image in the Disk Utility main window. Choose a name and a destination from the Save As... window. Keep in mind that your destination should have enough space to copy the entire DVD, which can be over four gigs.
A CD or DVD disc can become stuck in your Macintosh. It may not be appearing on your desktop or could be causing the computer to lock up if the computer cannot recognize it properly. First try the normal methods to remove the disc. Drag its icon to the Trash can in the Dock or select 'Eject' from the File menu. If you are running a virtual machine, e.g. VMFusion, ensure that the CD is disconnected from the virtual machine. This will sometimes allow the CD to now show up in Mac OS X.