You will need an internet connection for this, as OS X will be downloaded as it installs. Once finished, we can then install a clean copy of OS X on our Mac partition. Then, under Format, select Mac OS Extended (Journaled). On the left, select your Mac partition – i.e. To erase your Mac partition, restart your computer, and hold Cmd+R while it restarts. This is because your Mac should have a separate hidden ‘recovery’ partition, so even when you erase your Mac partition, your computer will still be able to re-install itself with a fresh copy of OS X later on. The best way to do this is to erase OS X and then re-install it.Įrasing your partition is quite safe – you’re not going to brick your machine. We want to force OS X to do a clean installation, not to just ‘repair’ or ‘restore’ itself. This should not take long – it took seconds on my Air.Īnd that’s it! Windows is now gone. The next screen should show how your hard drive will look once the Windows partition has been returned to the Mac partition. Select Remove Windows 7 or later version and click Continue. Your Mac data and istallation will be untouched, and the free space created will be added to the Mac partition.īoot OS X. This will remove the Windows partition, and restore your Mac back to its one-partition state. We can use Boot Camp Assistant to remove Windows first. This process assumes you have OS X Yosemite installed, though the process should be similar for other modern versions of OS X. There is no one-click solution to wipe and restore your Mac. This is a drastic solution that I only recommend if, for example, you are selling your computer. This will obviously remove all of your personal data, so make sure you’ve backed everything up you want to keep, because it will all be gone by the end.

Are you looking to wipe your Mac back to factory settings, and have a Windows installation you also want removing? This guide will show you how to restore a Mac back to its as-new state, with the Bootcamp Windows installation and its partition gone.

Restore macbook system storage