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.
1 You can also drag the disc icon to the trash. 2  For computers that did not ship with an optical drive and do not have the Apple USB SuperDrive, you can use CD or DVD sharing to access a CD or DVD in another computer's optical drive. Check the disc's surface for scratches and dirt, since these things can prevent the disc from appearing on the desktop. 2  Connect the MacBook Air SuperDrive directly to the computer's USB port instead a USB hub. 3  Reset the System Management Controller (SMC) . 4  Ensure your drive can read the specific type of disc being used.