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How to wipe my mac?

191 Views 4 Replies Latest reply: Jul 14, 2013 8:42 AM by Linc Davis RSS
Nazfrom1999 Calculating status...
Currently Being Moderated
Jul 14, 2013 1:03 AM

How do I wipe my mac it is really slow and i'm getting to the point where i would like to switch back to a windows computer

iMac, Mac OS X (10.7.5)
  • sig Level 8 Level 8 (35,770 points)
    Currently Being Moderated
    Jul 14, 2013 1:04 AM (in response to Nazfrom1999)

    From Kappy:


    "Drive Preparation


    1. Boot from your OS X Installer Disc. After the installer loads select your language and click on the Continue button.  When the menu bar appears select Disk Utility from the Utilities menu.


    If you are preparing an external or a non-startup drive, then open Disk Utility in your Utilities folder.


    2. After DU loads select your hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Note the SMART status of the drive in DU's status area.  If it does not say "Verified" then the drive is failing or has failed and will need replacing.  SMART info will not be reported  on external drives. Otherwise, click on thePartition tab in the DU main window.


    3. Under the Volume Scheme heading set the number of partitions from the drop down menu to one. Click on the Options button, set the partition scheme to GUID then click on the OK button. Set the format type to Mac OS Extended (Journaled.) Click on the Partition button and wait until the process has completed.


    4. Select the volume you just created (this is the sub-entry under the drive entry) from the left side list. Click on the Erase tab in the DU main window.


    5. Set the format type to Mac OS Extended (Journaled.) Click on the Securitybutton, check the button for Zero Data and click on OK to return to the Erase window.


    6. Click on the Erase button. The format process can take up to several hours depending upon the drive size.


    Steps 4-6 are optional but should be used on a drive that has never been formatted before, if the format type is not Mac OS Extended, if the partition scheme has been changed, or if a different operating system (not OS X) has been installed on the drive."

  • Barney-15E Level 7 Level 7 (33,425 points)
    Currently Being Moderated
    Jul 14, 2013 6:00 AM (in response to Nazfrom1999)

    Nazfrom1999 wrote:


    How do I wipe my mac it is really slow and i'm getting to the point where i would like to switch back to a windows computer

    What crapware did you install that has caused that to happen? Any of the various software that purports to "clean," "optimize," "protect," "speed-up," or "maintain" your Mac will cause the behavior you see.

    If you just wipe it clean and then install the same crapware, you will get the same result.


    You should really try to isolate the problems before annihilating them. That way, you can avoid running into the same problem shortly down the line.

    However, if you'd just prefer to run your Mac like Windows, filling it up with crap, then wiping and reinstalling periodically, please continue.

  • Terence Devlin Level 10 Level 10 (121,755 points)
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    Jul 14, 2013 7:10 AM (in response to Nazfrom1999)

    As I have commented before, in 20 years using Macs I've done this precisely once, in response to a very particular issue. In most cases it's tantamount to demolishing and rebuilding a kitchen when all you need do is replace a bulb in a light fitting.


    Best to trouble shoot the issue and fix it rather than this. Start with a full description of the issue, tell is useful information like which mac you have, how much Ram, what OS? When does the problem occur? Does it get worse the longer the machine is running? How much free space on your mac? And so on.

  • Linc Davis Level 10 Level 10 (107,985 points)
    Currently Being Moderated
    Jul 14, 2013 8:42 AM (in response to Nazfrom1999)

    First, back up all data immediately, as your boot drive might be failing.


    There are a few other possible causes of generalized slow performance that you can rule out easily.


    • Reset the System Management Controller.
    • If you have many image or video files on the Desktop with preview icons, move them to another folder.
    • If applicable, uncheck all boxes in the iCloud preference pane.
    • Disconnect all non-essential wired peripherals and remove aftermarket expansion cards, if any.
    • Check your keychains in Keychain Access for excessively duplicated items.
    • Boot into Recovery mode, launch Disk Utility, and run Repair Disk.


    Otherwise, take the steps below when you notice the problem.


    Step 1


    Launch the Activity Monitor application in any of the following ways:


    ☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)


    ☞ In the Finder, select Go Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.


    ☞ Open LaunchPad. Click Utilities, then Activity Monitor in the icon grid.


    Select the CPU tab of the Activity Monitor window.


    Select All Processes from the menu in the toolbar, if not already selected.


    Click the heading of the % CPU column in the process table to sort the entries by CPU usage. You may have to click it twice to get the highest value at the top. What is it, and what is the process? Also post the values for % User, % System, and % Idle at the bottom of the window.


    Select the System Memory tab. What values are shown in the bottom part of the window for Page outs and Swap used?


    Next, select the Disk Activity tab. Post the approximate values shown for Reads in/sec and Writes out/sec (not Reads in and Writes out.)


    Step 2


    If you have more than one user account, you must be logged in as an administrator to carry out this step.


    Launch the Console application in the same way you launched Activity Monitor. Make sure the title of the Console window is All Messages. If it isn't, select All Messages from the SYSTEM LOG QUERIES menu on the left. If you don't see that menu, select

    View Show Log List

    from the menu bar.


    Select the 50 or so most recent entries in the log. Copy them to the Clipboard (command-C). Paste into a reply to this message (command-V). You're looking for entries at the end of the log, not at the beginning.


    When posting a log extract, be selective. Don't post more than is requested.

    Please do not indiscriminately dump thousands of lines from the log into this discussion.

    Important: Some personal information, such as your name, may appear in the log. Anonymize before posting. That should be easy to do if your extract is not too long.


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