Nuking a Dell Computer with a SSD
Once again, spam F12 on startup to get the BIOS screen. This time, select BIOS Setup.

Now a screen like below should pop up. Hit the plus sign next to “Maintenance” and then click Data Wipe. Now on the right side, check the box that says Wipe on Next Boot. You should get a popup like below where you have to click OK. Then click Apply, and the computer should automatically reboot and start wiping the data. This is a safe way to wipe for an SSD.

Don’t forget to double check that the device has been marked as surplussed in HelpDesk before putting it in the surplus pile.
Nuking a Mac
The easiest way to nuke a Mac is to shut down the device, then click the power button and hold down Command+R (the command key and the R key) till you see the Apple on the screen. You then have to wait till it boots up but you should eventually see something like this:

Go to “Recovery Assistant” in the top left menu, click “Erase Mac” at the bottom. There will be 2 more options to click “Erase Mac”. Choose it each time.
Or it may look like this:

Go ahead and hit Enter. The next screen looks like this:

Double click Disk Utility to open the Disk Utility:

Select the storage device you want to nuke on the left-hand panel (you should wipe all of them one by one if you want a clean nuke) and then click “erase” in the top panel. The drop down box should appear as shown above. If the Mac has SSD storage, it will look exactly as above and all you need to do is click erase. If its an older Mac with a hard drive, you will see a Security Options drop down menu in between the Format box and the Erase button. You will need to chose 3 passes. The SSD way takes seconds, the hard drive way takes hours.
Don’t forget to double check that the device has been marked as surplussed in HelpDesk before putting it in the surplus pile.
Reimaging a Mac After its Been Nuked
If you try to start up a Mac that has been nuked, all that happens is a File Folder with a question mark will blink on the screen for about 5 minutes and then the machine turns off. In order to get the Mac back working, shut it down, and click the power button and hold down Command+Option+R. This will boot the Mac into internet recovery mode.

This time double click the Reinstall macOS option. It will take you through a self explanatory walk through of installing the latest (or the newest that can be installed on your mac) macOS. After you have reinstalled the OS, follow the Mac imaging process as usual (https://humcsr.byu.edu/2018/08/10/setting-up-a-new-mac-computer/).
Using DBAN
This is the old way to nuke, and YOU SHOULD ONLY USE THIS METHOD ON HARD DISKS. If the computer has an SSD, or is any Mac newer than 2013 (usually it doesn’t work on any Mac), this method should not be used because it degrades the SSD. Look below at the other sections for how to nuke macs and how to nuke Dells with SSDs.
Grab a DBAN flash drive. They are labelled as such and are kept in the West filing cabinet drawer next to the middle desk. Plug it into the computer, and if you are on a Dell computer, spam F12 while booting up to get to the BIOS screen.
Select the flash drive that has DBAN on it. You may have to Change Boot Mode Settings to Legacy without Secure Boot in order for the computer to boot to the flash drive. DBAN should automatically start with a blue screen. From this screen, all you need to do is type AUTONUKE and hit enter (caps don’t matter). The computer will automatically start securely erasing the hard drive. It usually takes about 5-7 hours, so chances are it will be left overnight.
If you are nuking a lot of computers, the DBAN flash drive is hot swappable. Meaning as soon as you see the blue screen, you can take out the flash drive and start the process on another computer.
Don’t forget to double check that the device has been marked as surplussed in HelpDesk before putting it in the surplus pile.