Once ready, press Enter/Return.Īfter you do, just sit back and watch Terminal do its magic securely erasing all your hard drive’s free space. Also, change ‘disk0s2’ to your hard drive’s own Identifier number. Just make sure to keep the number on ‘1’ or to change it to either ‘2’ or ‘3’ depending on how secure you want the erase process to be. With this information, you can now use the first command from above: diskutil secureErase freespace 1 /dev/disk0s2 In my case, I want to securely erase the free space on the disk with 120.5 GB, so its Identifier number would be ‘disk0s2’. What you need to copy is the Identifier number beside your selected disk. This will display a list of all your Mac’s hard drives. For this, open Terminal and copy and paste this command: diskutil list – Now, the second value you need to know is the Identifier number of the disk where you want to perform the process. Usually, using numbers ‘1’ or ‘2’ should be more than enough to perform a safe erase. Obviously, the higher the number you choose, the longer the process will take. Number ‘2’ uses a 7-pass secure erase and number ‘3’ uses a special algorithm to perform a huge 35-pass secure erase. Using number ‘1’ erases your disk’s free space using a random single pass (one ‘pass’ means that the system overwrites the deleted files once). You can actually choose between ‘1’, ‘2’ and ‘3’ here. – The first value to change is the number ‘1’. This is because this command uses slightly different values for each Mac, so before using it on Terminal, you will have to find the exact values for your Mac first. diskutil secureErase freespace 1 /dev/disk0s2 Just keep it there for now, since you will need to slightly change it before proceeding. So let’s learn how to securely erase all that free space on your Mac’s hard drive with Terminal.įirst, here is the Terminal command we will be using. Important Note: Always remember to use Terminal ONLY when you are confident in what you are doing, since a simple mistake when using this utility can cause some serious damage to your Mac. Unless, of course, you delete them securely first.įor this, using the Terminal utility is perhaps the best way out, since it allows you much more control over what you are doing. What this means is that an advanced user who might come into possession of your Mac can actually recover files that you have deleted previously. Then, when you add more files to your Mac, they ‘overwrite’ the space taken by those unusable files that you deleted previously. Well, you might not know this, but once you delete any file from your Mac the usual way, the file actually remains there, only that it is no longer usable by your Mac. Erase free disk space mac free download - Disk Inventory X, Disk Drill, StarCraft Demo for Mac (Classic OS), and many more programs.Īfter reading that title, you must be asking yourself: How will I delete hard drive space that is already ‘free’? The feature allowed you to overwrite the free space on a drive to prevent. The Secure Erase Free Space feature in Disk Utility on your Mac added a layer of privacy and security to file deletion. There are following steps that can be used to remove the data. This is a very crucial step because any information left on the device can have serious drawbacks. Secure Erase free Space/cleaning the data from MAC: Before one is selling a mac, all the data from it or it can be done just to increase the speed of the MAC operating system. Free Software To Erase Free Space In Mac Computer.Even more so, if you are working on a computer that you share with others. You never know when you need to make sure that some files are deleted permanently, with no chance of recovery. Even if you do not use such a program on a regular basis, it does not hurt to have one ready on your Windows device. We hope that our free file shredders roundup was helpful. Others work well enough but lack contextual menu options (including WipeFile), which do the whole erasing thing much faster and more comfortable. The others do not even come close to the number of erasing methods included, even if some of them offer the best ones on this line of work: the Gutmann and the DoD algorithms. The only one that offers even more algorithms is WipeFile, but it is no match to Eraser regarding the user interface. All the other programs are lagging when compared to Eraser. When compared to the other apps, Eraser offers one of the most extensive selections of erasure algorithms and the best user interface, as well as more configuration options. Out of all the free apps that we tested in this roundup, Eraser is the best file shredder. If you look at the numbers and features each program offers the winner immediately stands out.
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