SPX Nighttime Or take the weekend.

The same technology that goes into SPX is here: the acclaimed SPX 35-step Gutmann shredding engine. Except this time it ravishes your entire hard drive instead.

If you're in a hurry you can always opt for a 'quick clean', but for those who can only settle for the best, click the 'Weekend' switch. It may take a while, but nothing can protect you better. The SPX shredding engine was the first available for OS X and it's still by far the fastest and the best.*

*'Weekend' is 'relative' - a SPX 35-step Gutmann shred is going to take longer. Yet users report speeds of in excess of 20 GB/hour, meaning it still could be finished in a single 'nighttime'. Try and see for yourself.

See Also
The Secure Delete Hoax