How to securely delete files in your Mac OS X Snow leopard? (Optimize Snow Leopard now!) Don’t pay for third party software, newer Mac comes bundled with the new ‘Secure Empty Trash’ feature.
- Open Finder
- Go to the menu, click Finder and select Preferences
- Select the Advanced tab
- Check the Empty Trash securely checkbox
There is a reason why this unique feature is not enabled by default, some of the reasons are – it takes a longer time to delete these unwanted files because it needs to overwrite the existing sector, not to mention this method might shorten the hard disk lifespan. Not recommended for average user, unless you have lots of ‘top secret’ data in your hard disk.