Note: Re-installing OS X is typically only necessary when something is seriously wrong with the Mac system software and the computer is not functioning as it should.Do not attempt to use recovery mode for reinstalling unless you have made a thorough backup of your important files beforehand, doing so without a backup may result in irreversible file loss.You can start the internet recovery reinstall process from either a shutdown Mac, or by rebooting the Mac.
To be clear, we’re going to focus on Internet Recovery here, but there are actually two modes of system recovery; one of which is based on a local Recovery disk partition, and the other which is called Internet Recovery, the latter being triggered if the Mac does not have a Recovery partition found or if booted directly into as shown in this walkthrough.
Both of the recovery modes let you re-install OS X, but the version of OS X that is installed onto the Mac will be different depending on the type of recovery mode used.
Try editing the favorite name to something easier to say.
In some rare situations, reinstalling OS X on a Mac may be required.
You can control Internet Explorer with a Kinect sensor by using your voice.