Mac erase free space failed

I get the same error using the terminal commands listed here. Says it can not set up temporary file. Does anyone know how to get past this problem?

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First, the article is wrong. All you are doing is writing zeros here where file contents used to be. Secure erase is still needed. Second, most formats DO not do this. Formatting in most cases simply resets the pointers to the data. It does not erase the data. If you remove that… Goodbye to ALL your data. Writing many times to the same area. This would just kill the drive sooner. Instead, write zeros or whatever a single time. That is really enough to remove the data from the deleted space. Name required. Mail will not be published required. All Rights Reserved.

No Disk Space After Failed Disk Utility Erase Free Space

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One slight problem so far is that so of the files on the hard drive have special permissions and can't be copied, so if I have to reinstall, it looks like I will end up losing at least a few things. I tried using it, but it didn't seem to do anything. I am wondering if I need to replace the asterisk in the command with something specific for my computer. Or maybe I can show the hidden files, and go in manually and delete the file? Dec 15, Here is what you need to type into a Terminal window to view hidden files Hey, thanks!

Losing Mac drive space to "Backups" - How to Fix , how to free up space hard drive Mac

I actually got everything worked out a bit earlier through some assistance by a very helpful person at Macrumors. I ended up using a Terminal command to erase the temporary file that had been created by Disk Utility and then restarted my computer, and the free space showed up. I was very thankful, as I needed to study for an exam tomorrow and was effectively unable to use my computer. Psykamaholik Registered Dec 17, I have got this exact same problem with two new extra hard drives I tried to install into my mac pro, the first one seemed to work for a while then as I was transferring a heap of files across it stopped and came up with an error something along the lines of files names being too long.

After a restart I could no longer use that drive, it cant mount it, I cant erase it, basically disk utility can't do a thing with it.

How to Secure Erase Free Space on Mac Drives with OS X El Capitan

So I put in the 2nd hard drive and after trying to partition it, it went straight to the unusable condition that the first one was now in. Going by what I've read in this thread my question is how do I use terminal to fix this problem? The boot drive is running OSX Paul Pollock Registered Dec 18, Hi, Signed in specifically to reply to your problem, Psykamaholik.

I am presently the only Macintosh Technician in my town, and I've seen your kind of problem before. Sometimes it is bad media on the Boot-drive, sometimes it is bad software in the OSX, and sometimes it is hardware related. If your problem is hardware related, you are toast. No fix but hardware replacement. Firstly, it is NEVER a good idea to "clear free space" on a drive with an existing system anybody that says otherwise, is opening your system for obscure system or media errors that cannot be easily solved, better to stay away from it altogether, except to setup a new drive.

One only does this on a clean drive, newly formatted, and only on a drive you have recently bought new. This task is the only way to make sure that the newly manufactured drive is cleanly formatted and that all the media actually works hard errors are trapped out by "Clear Free Space". The mapout table file is now the authority, and it's full of junk. Even when "Clear Free Space" actually works with a drive that contains a system, drive performance suffers drastically, and one cannot easily get your original performance restored.

This is why you are running into big trouble with your secondary drives. Something is hinky on your boot drive boot-drive is working because the system was installed without incident, but is not working on the secondary drive because problems that have invaded the boot-drive [after system install] are now transferred to the secondary drive where the system does NOT exist.

Erase Free Space Feature

I realize this sounds like gobbledygook, but while this kind of problem is not common, it MUST be dealt with by prevention. It cannot be easily repaired after the fact. First, make absolutely sure your boot drive has no problems on it. This must be looked at by a good quality 3rd party expert repair tool like "TechTool Pro", or "Drive Genius". Even then, rare problems might not be caught.


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If you really need to be quite sure, first perform a bootable backup with "Carbon Copy Cloner" or equiv. Confirm you can boot from your backup.

Then while booted from your backup , format your boot-drive and THEN perform a "Clear Free Space" which will write controlled data to all sectors which might otherwise produce binary boundary errors that can transmit to another drive invisibly thru the OSX. If there are any doubts at all about your Installed OSX on the Backup bad drivers, corrupt disk management that still basically works on your boot-drive , skip the previous boot from your Backup except to insure you can boot from it , and run your OSX Installer DVD, and use the Disk Utility on the DVD known good, right?


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As an aside, it is a VERY good idea to Format using the Partition Screen window only available when the drive device hardware is highlighted instead of the partition under the device in the main left table in Disk Utility selecting only one 1 partition, don't leave it in the pre-existing condition in the pull-down, because any errors in the partition table will only be erased by re-establishing the table by selecting the number of partitions [normally 1] , rather than doing this via the Erase screen big no-no, only use Erase when you are sure both the boot-drive and the new drive is otherwise "good".

Now boot from your Backup and do "Carbon Copy Cloner" back to your boot-drive. This should put your system back to rights barring errors in the backed up OSX system. Then do all the updates. Now everything clean.

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If boot-drive erased, second backup drive will need to be used to install system, Migration Assistant now points to existing first Backup. Migration Assistant only works on Firewire with If, after any or all of the previous, you still can't get the secondary drive to format and Clear Free Space, NOW you ARE dealing with a computer hardware problem or failure.

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And that means trying to initialize and start over with your boot-drive, from scratch may prove difficult or problematic in the future too. I have run into several computers that are getting tired or worn, and will overheat and freeze-up in the middle of critical operations like "Clear Free Space"; which can bash your boot-drive, or any other drive, for that matter.