To do a clean install, boot into the OSX Recovery partition. I think there's an option in there to recover, or you can alternatively just open the disk manager in recovery and format the OSX partition ONLY. From there, install.
I don't know which mac you have; mine is a UEFI device so I don't need to worry about backing up my windows install, as it is standalone.
To do a clean install, boot into the OSX Recovery partition. I think there's an option in there to recover, or you can alternatively just open the disk manager in recovery and format the OSX partition ONLY. From there, install.
I don't know which mac you have; mine is a UEFI device so I don't need to worry about backing up my windows install, as it is standalone.