Jul 26, 2017 - Free Download for Mac. Data eraser for macOS 10.13 High Sierra. No.3 data eraser for macOS 10.13 High Sierra: Permanent Eraser.

• • • Mac 101 is an ongoing series aimed at bringing attention to important technical issues facing Mac owners. A wide variety of topics will be explored in an effort to inform as well as help make your day-to-day Mac computing experience a better one. There are two ways to think about securing information: Enabling access to information that you want to keep, and disabling access to information you no longer want to keep.

In this post, we will focus on the information Mac users no longer want to keep. If you are thinking that this is as easy as moving a file to the trash, then emptying the trash, think again. There are numerous data recovery utilities on the market that can recover lost or deleted files.

And these utilities work because most of us do not know how to securely erase information off of our Macs. The following are some tips on how you can at least make if very difficult for others to recover your unwanted files. Finder’s Secure Empty Trash When you just empty the trash on a Mac, OS X no longer keeps track of where the data associated with the file is stored on the hard drive. The data is still there, it’s just that the Finder can no longer find it. As you continue to work and OS X saves new files on your hard drive, OS X could write over parts of your deleted files data with the new files data.


What take advantage of is the chance that old data is still there, and has not yet been written over by new data. When you instead elect to use, OS X does in fact ensure that the old data is written over with new data, which will ensure that the old data is no longer there — think of it like scribbling out a written message on a post-it note. What is not known for sure is how many times Secure Empty Trash writes over the old file’s data. Department of Defense require that erased data be written over no less than seven times. Why seven times?

It just so happens that because of the way hard drives work, there is an opportunity for parts of the data to remain on the physical disk. There is a mechanical arm that reaches out across the hard drive to read and write data off of a magnetic platter.

Cannot find forms in excel ribbon for mac. Excel preferences. Scroll to the bottom of the list. (Remember that with the latest OS, the scroll bars may not show). Add new tab or new group: To add new tab or new group, click below the Customize the Ribbon box, and select New tab or New group. Remove tabs: You can remove custom tabs only from the Ribbon. To remove, select your tab in the Customize the Ribbon box and click.

That mechanical arm may not pass over exactly the same spot on the hard drive with each pass. If you remove the platter from the drive, you can actually scan the surface of the drive using a much more precise mechanical arm to read old data off of the drive. Writing over the data seven times compensates for this opportunity. Think of it like plowing a field: The more times you plow over the earth, the less likely you are to see last season’s crop lines. Permanent Erasure Utility There are utilities that you can use that take this even further. Available is a free utility from called Permanent Eraser.