Excuse my ignorance, but I am just a mac user with limited in-depth IT knowledge. I am planning to use the Disk Wiper for mac to wipe my macbook air SSD. I would then like to perform a clean re-install of macOS Sierra using a bootable flash drive. I'd like to know if this is possible, or if the fact that I will have wiped the SSD will make it impossible for the bootable flash drive to work. In other words, does there need to be something left intact on the SSD for the install to do what it needs to do from the bootable flash drive? All of the clean install instructions I've seen involve using Mac's disk utility to erase the SSD. Thanks in advance.