
Now the Mac OS will start downloading and this process will take quite some time depending on your internet speed. Here, select Macintosh HD and click on Install and then click on Continue. Then in the next window, you will have to select the drive in which you want to install the OS. Now as your mac is connected to WiFi, it will download the OS from the Apple for re-installation. Click Continue again in the next two windows. Here, select Reinstall Mac OS X and click on Continue. It will now show the Mac OS X Utilities window again. Once it is finished, you can see that the hard drive is completely erased by looking at the free space given at the bottom of disk utility window. I have attached a sample screen clip below to depict the process.Ĭlick on "Erase" again to confirm.

This will turn on your mac but it will not directly boot to the desktop.

Hold down option key and power button for a few seconds.Turn off your MAC : The first step you need to do is to SHUT DOWN your mac machine.I have followed these steps on my MAC OSX 10.9 Mavericks and everything works fine after that. This post will explain all the steps that need to be taken in order to do a factory reset to your MAC.
