Software :: Deleting Everything Before Using Disk Utility To Erase All
Aug 31, 2010
I am selling my 6 months Macbook pro and I would like to delete everything very securely. I would normally do a fresh install and then use disk utility to erase all date on a 35 pass. However I do not have the installation disks. I am not the best at using a mac but could someone tell me everything I have to delete and the steps I must take before I do a 35 pass erase in disk utility? I have noticed in console that I cant delete 'Diagnostic and usage messages'. I have gone through Finder then deleted the applications and gone to application support and deleted what I have seen but is there anything I am likely to miss being a non techy guy? I don't want to leave anything at all on the mac in the slightest.
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Sep 7, 2009
Anyone knows why my external HD (USB disk connected to Airport extreme) does not show up in disk utility? (It sits on my desktop just fine and is fully functional) I' want to erase a partition but now i don't know how.
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Jan 28, 2008
I am having trouble erasing DVD+RW discs. When I insert a used disc and try to erase it in Disk Utility, the process seems to complete almost immediately, ending with OS X asking me if I want to mount the inserted blank disc in Finder. However, if I eject the disc and put it back in, everything is still on there. (detail: When erasing, there is usually a short interval where a striped progress bar is shown, after which a "normal" progress bar is slowly filled as the disc is erased. However, for me only the striped progress bar is shown--the "normal" progress bar is skipped--and then OS X says erasing is done.) If instead of ejecting the disc I choose to go ahead and burn something as if Disk Utility has actually erased the disc, I get a laser power calibration error.
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Aug 11, 2009
I have been reading that the erase feature on OS X's disk utility will not remove file slack. If I erase the entire drive using one of the security options (Zero-Out, 7-Pass, or 35-pass),
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Oct 9, 2009
I recently installed and uninstalled a few versions of linux on my imac. After installing some versions i realized I was going to need more space, so I went back into mac OSX and have been trying to add a new disk partitions with more GB.
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Feb 10, 2009
i was Erasing Free Space in Disk Utility, after a while I needed to Force Quit another program but I mistakenly quit Disk Utility and now it says I only have 3.1 GB space available when it should be around 270 GB available. I'm sure Disk Utility said it was 'Creating Temporary File' at this time this happened.
I'm now also getting a message which states I need to clear out space on my start up disk.
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Aug 28, 2009
I would like to know the difference between the options 'erase' and partition' in disk utility. Under 'erase' there are several options: under 'security options' there are 4 options: don't erase data, zero out data, 7-pass erase and 35-pass erase.
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Nov 7, 2009
i just erased my external hard drive through disk utility my accident. I had VERY important files and the 1tb was full.
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May 3, 2009
I just ran the Erase Free Space thinking it would help me with a bootcamp issue.
I had 70Gb free and I stopped it when I noticed i had 30 Gb free left. So I just lost 40 Gb of hard drive space. What happened? is there anyway of recovering it or did I just make a huge mistake.
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Feb 27, 2010
My Computer: 2.8 GHz intel Core 2 Duo Mac, running OS X Ver. 10.5.8. I've partitioned my hard drive before, but in order to get more space on my Windows partition I have made a disk image using a program called Winclone. I also backed up important files to my external hard drive, and then used disk utility to erase and make a new partition so I could restore the Winclone disk image I made and have everything back. What I'm concerned about is I've been waiting for this new partition (65 GB) to finish being made and its taking a while. I read that if you stop the process it could damage the OS X side and you could lose all your files.
I started to run time machine about 10 minutes ago and set the destination to my external drive for backup (Its a huge drive, it can hold 650+ GB so I'm not worried about running out of space.) Do I stop Disk Utility and risk it? Do I let it run? Do I kiss my computer goodbye and pray that Time Machine backed everything up right onto my external hard drive? I don't know if Time Machine is working correctly because I started it after I began to partition my hard drive. What to do. Should I let Time Machine back everything up, the disconnect my external and end Disk Utility?
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Feb 26, 2012
I am trying to reinstall Lion on my macbook pro, but every time the hdd shows up as 'locked' and when I attempt to format it, it gives me a "volume erase failed with the error - cannot unmount disk" message. It appears as if some files withing the disk are still running but I have no way of quitting them-knowingly. I can specify more if this seems to vague.
Info:
MacBook Pro
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Oct 17, 2010
I have an external hard drive that was used on a PC. I want to use it on a Mac. I went into disk utility and did an erase. (Extended Journaled and in security options changed it to zero out data). I can now use it on the Mac how ever it is telling me that there is 54.1 MB of used space. I want to have access to this. How do I do it?
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Dec 19, 2010
I have a hard drive with about 250 gb of film and music on fbut it's formatted as HFS+ which windows cant read! I need to partition the drive to make windows be able to read at least a portion of it. But If I run disk utility and create a partition will it erase the info I already have on there? I don't have this data else where so I hope it wont!
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Dec 17, 2010
I try to securely erase big hard drive and Disk Utility in Tiger says Secure Erase. Pass 1 of 7. Estimated time 123 hours
Is this progress bar only for erase 1/7 or for all 7 passes (1-7/7)?
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Aug 15, 2009
1. To grab all the files I need/don't want to lose (photos, music, documents, etc.)2. Then completely erase the 500GB HD so I can then install it into the new Macbook Pro and install Leopard.(I'll then externally connect the 160GB HD that came w/ my Macbook Pro and add the files I've already copied into that 160GB HD into the 500GB Leopard installed HD in the new Macbook Pro)So, currently my 500GB HD is connected to my Macbook pro and I want to completely erase everything so I'll then have a completely clean hard drive, to then install into the Macbook Pro, add the installation discs and install Leopard into the 500GB HD.
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Mar 24, 2010
I am planning to upgrade my Windows 7 32 bit bootcamp partition to Windows 7 64 bit. I know I have to do a clean install to do this, so I am planning to wipe my Windows partition and start from scratch. I am trying to figure out how to remove my bootcamp partition though. If I use the bootcamp assistant, it seems like it will only give me 231gb of space back for Mac OSX. I have a 250gb HD, so where is the extra space going since my Windows partition is 42gb? Can I just delete it with Disk Utility to recover the space back? Could I possibly screw this up by using Disk Utility?
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Dec 15, 2010
I'm having a pretty serious problem. I attempted to erase the free space on my HD, as I do from time to time, except this time it appeared to hang/freeze at the end, when it gets to the part where it creates a temporary file. I waited for several minutes and it didn't move. I tried clicking the skip button, but that did nothing either, so I force quit Disk Utility.
The problem is, it left the disk at "Zero KB" of free space, effectively making my computer inoperable. I was in the process of studying for a huge exam tomorrow, and am currently flipping out.
If it matters, I'm on a Macbook Pro 2.33 GHz Core 2 Duo, running 10.4.
I really don't want to have to reinstall the OS and import the old files, but my real fear is that I will have to do a fresh install of the OS.
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Dec 15, 2010
I'm having a pretty serious problem. I attempted to erase the free space on my HD, as I do from time to time, except this time it appeared to hang/freeze at the end, when it gets to the part where it creates a temporary file. I waited for several minutes and it didn't move. I tried clicking the skip button, but that did nothing either, so I force quit Disk Utility.
The problem is, it left the disk at "Zero KB" of free space, effectively making my computer inoperable. I was in the process of studying for a huge exam tomorrow, and am currently flipping out. Any help would be greatly appreciated.
If it matters, I'm on a Macbook Pro 2.33 GHz Core 2 Duo, running 10.4.
I really don't want to have to reinstall the OS and import the old files, but my real fear is that I will have to do a fresh install of the OS.
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Jun 23, 2009
I would like to "Back-up", "Clone" or create an "Image" or whatever else people call it of my bootcamp installation. I know I can create an "Image" of bootcamp via disk utility but how would I restore it?
Would I first delete the bootcamp partition and then re-create a bootcamp partition and then restore? Or would I just restore? Will the end result be what I am expecting, i.e., my Win 7 install right back to the perfect state of when I created the image?
Right now, let's say my Windows 7 install got smoked one day for whatever reason (it is windows...) and I needed to re-install. Me personally, I would just go into Bootcamp Assistant, delete the Windows partition then create a new one and then get installing. Unfortunately installing and updating takes hours and that is what I am trying to avoid.
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Jun 10, 2012
I had downloaded some files to add to an external hard drive, the hard drive was assigned to a pc before adding these files so it wouldn't let me add files from my MacBook..Â
Had a look around online and made some changes (well thats what I thought) and I was able to transfer files form my MacBook onto the external hard drive.Â
What I then figured out was that there was nothing left on the hard drive except for the two file sI just transferred..Â
It turns out I deleted everyting without noticing.
The stpes I followed was to go to disk utility then select the hard drive and click erase (not knowing this would erase evrything).Â
So now I have two files on my hard drive and no idea how to recover the 'delted' files.Â
I tried using Disk Drill, which found the files but then it said I need to buy the full version to recover them.Â
I am wondering if there is any free methods to recover these files at all
Info:
MacBook Pro (13-inch Early 2011)
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Jul 27, 2009
I bought an imac 2 years ago, and updated it to leopard when that was released.
I no longer have the discs i used for Leopard, only the original mac os x 10.4 discs.I am very soon going to be selling this machine and need to wipe everything so that all is left if the operating system in the form you would expect as if you had just bought a new mac.How can this be achieved, i tried disck utility> erase, but only erase free space was 'highlighted'.
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Mar 7, 2010
I have a 500G WD external HD, and I used Disk Utility to securely (35-pass) erase it. Now the I cannot do anything to the drive. Cannot erase or partition it. When I try disk utility says the task has "failed with the error: POSIX reports: The operation couldn�t be completed. Cannot allocate memory" Before the drive would show on the desktop as, WD 5000BEV External Media, when I plugged it in. Now it has a message saying that "The disk you inserted was not readable by this computer." Then it gives me three options which are... Initialize, Ignore, Eject. When I click Initialize I am redirected to Disk Utility. Also now in disk utility it says that it is a 2.2 TB WD Media opposed to WD 5000BEV External Media. How does it go from a 500g to a 2.2t It is unformatted and I do not know how to reformat it back to the it was.
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Jun 9, 2012
My Time Machine quit BU for over 10 days and then it started to BU whole computer like it was an initial BU. Previously it used 1.5TB of 2TBHD so tried to BU everything again. I wasn't able to erase HD using Disk Utility so I changed the drive to a regular HD in Time Machine preferences and deleted data to trash. Tried to Erase in Disk Utility and it says disk is unformatted and stops utility. How do I erase this HD?
Info:Mac OS X (10.7.2), Parallels, Win7, FoxFire, iPhone3GS
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Aug 7, 2010
I bought a used mac and when I erase the disk, afterwards it still shows 2 files and 2 folders on the disk taking up 40+mb of space. What is that? When you erase the disk isn't it supposed to be completely empty?
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Jun 18, 2012
Installing Imac back to factory settings, erase disk shows could't unmount disk how to solve
Info:
MacBook Pro, Mac OS X (10.7.4), I bought a usb stick with the OS Xa
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Oct 7, 2010
After I erase the hard disk it shows 74.5gb free, almost. It says there is 42.3mb of space being used by 2 files which I understand are used for read write or partitioning or whatever.
When I then leave disk utility and go to the actual installer, the destination disk (untitled - 74.5gb) shows only 73.9gb free space. What is taking up an additional 500mb of space on the hard drive?
Apple support told me that somehow the disk has been altered and I lost space on the disk or I am now using a seperate partition that isn't showing up. Disk utility shows only one partition with 74.5gb free space. He told me I can find information about how to 'merge' the disk on the apple support section under troubleshooting articles for disk utility. I have been unable to locate this information.
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Nov 25, 2009
I am trying to repair my disk so I can install bootcamp, but when I reboot my machine and run disk utility and choose repair disk, it hangs. Does anyone have any ideas ?
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Apr 24, 2012
I have a 2TB Western Digital My Book Studio FW800 external that has 5 partitions, connected to my 2011 iMac. I had help doing the partitions and don't really remember the reasoning, but one is just for my SuperDuper! backup, one is Miscellaneous, one for movie clips off my camcorder, one for misc scanned photo's and one for my genealogy research. I back up using Time Machine to a Time Capsule and also to this WD hard drive with SuperDuper!Â
Recently I'm getting a pop up message that "Mac OS X can't repair the disk "Genealogy"'. And it needs to be reformatted. It's become a read only disk. When I look in Disk Utility it shows all the partitions as "Mac OS Extended (Journaled)" EXCEPT for the one in question. I also noticed that there are a lot of files with "date created" being the same date in 1969! These files may be letters I've written or photo's I added to that partition within the last few years.Â
I think I have to completely reformat the entire external hard drive to repair this, but I want to make sure. Because it's going to be a major hassle backing it all up to another external (having to get one first) and then figuring out how to make the files that have turned "read only" in that one partition, back to their original state!  Does this sound right, that I have to reformat the entire external hard drive? And how do I get the read-only files back to their original state.
Info:
iMac, Mac OS X (10.7.3)
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Jun 24, 2014
I get this question mark along with a folder when starting up. I tried holding down the option key when turning on the power and then I get an internet recovery along with a globe. I click on the arrow below it and it takes maybe 15 minutes to start up. Then i get this disk utilities screen. I'm now unable to do anything. When going into disk utility, disk 0 shows with Mac OS X base system underneath it. All the clickable buttons are faded out. Is there something wrong with the hardrive? and where could i get this fixed? There isn't a warranty on it.
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Jan 2, 2010
Running Diks Util on my iMac 10.6.2. i am given this warning.
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Warning: SUID file "System/Library/CoreServices/RemoteManagement/ARDAgent.app/Contents/MacOS/ARDAgent" has been modified and will not be repaired.
Is it something I should heed and what to do in that case?
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