How to format & clean reinstall OSX Yosemite?

My MacBook Pro has the iWorm. Deleted the folders suspected of iWorm (JavaW) and restored host file. Thinking of formatting and clean install of Yosemite back.
I suspect I got the iWorm from pirated Adobe software, and others.
I've checked my backup in Time Machine and I suspect all of it has the same thing going on with the iWorm.
Nothing much that is important in my computer other than music, some school projects and photos. Can I just copy what I deem important and then reformat and reinstall Yosemite? And if I do all that, do I have to re-register back my data about the MacBook, like registering my MacBook's serial key etc?
Thanks

Niel wrote:
1. Yes.
2. No.
(125796)
No to what, the part about re-registering?
ChrisRoz wrote:
Follow the instructions in the links below.
http://osxdaily.com/2014/10/16/make-os-x-yosemite-boot-install-drive/
http://osxdaily.com/2014/10/18/clean-install-os-x-yosemite/
Is there another way besides using a thumb drive? Not having one currently.
Can I just erase the hard drive via Disk Utility or reset back to factory settings, and then download Yosemite through App Store and install again?

Similar Messages

  • Can't connect to time capsule after clean reinstall of Yosemite

    Hi
    I was having performance issues with my MBP and it looked like a clean reinstall of Yosemite was the answer. I have performed the reinstall and re install my apps. I want to bring back my data from my time capsule but I can't connect.
    When I tried in Migration Assistant it said there were problems connecting. If I use Finder, it is visible under the Shared heading but it says I can't connect.
    How can I reconnect my time capsule so that I can bring back my data?
    Thanks in advance.

    Reset the TC to factory.. redo the setup from Yosemite version Airport Utility.. no files are lost doing this.
    Factory reset universal
    Power off the TC.. ie pull the power cord or power off at the wall.. wait 10sec.. hold in the reset button.. be gentle.. power on again still holding in reset.. and keep holding it in for another 10sec. You may need some help as it is hard to both hold in reset and apply power. It will show success by rapidly blinking the front led. Release the reset.. and wait a couple of min for the TC to reset and come back with factory settings. If the front LED doesn’t blink rapidly you missed it and simply try again. The reset is fairly fragile in these.. press it so you feel it just click and no more.. I have seen people bend the lever or even break it. I use a toothpick as tool.
    N.B. None of your files on the hard disk of the TC are deleted.. this simply clears out the router settings of the TC.
    When you do the setup, give the TC short names with no spaces and pure alphanumeric characters.. same for passwords.. 8-20 characters.
    Now in Finder mount the TC by IP address rather than by name.
    Use Go, Connect to Server from top menu,
    SMB://10.0.1.1 for example.
    It has to be static IP which is default in router mode but not so in bridge.
    If you are bridged use the name or fix the IP.. dhcp reservation in the main router.
    Type in like this for name.
    SMB://TCname.local (replace with your new name and local is default domain .. it is important and helps).
    Remember to save the password in the keychain when asked.
    Good luck.. and if it fails clean install Mavericks or even Mountain Lion.. they work so much better.

  • HT201475 how to do clean install of yosemite

    how to do clean install of yosemite

    Do a backup before doing anything.
    If you want to make a clean install of Yosemite boot into the Recovery Volume (command - R) on a restart, use Disk Utility to Verify/Repair  the disk and run Repair Permissions. Then erase the hard drive using Mac OS Extended (Journaled) format using the Options button. Reinstall Yosemite. Restart normally and test. Use Setup Assistant or Migration Assistant to import what you want.
    Clean Install
    I would download the installer and you can make a bootable USB stick to install using this free program. You can then install from there.
    Bootable USB Flash Drive – Diskmaker X

  • Clean reinstall for yosemite 10.10.3

    i downloaded new update 10.10.3 on my  early 2011,   2.2  GHz, plenty of space.  I get the WHEEL OF DEATH ON ALMOST EVERY APPLICATION.  Would a clean reinstall help and how do i do it?

    these are the instructions on how to do a fresh install of Yosemite:
    Backup your data to an external drive before doing a clean install.
    1) Restart computer while holding down the Option key. A screen should show up allowing you to select either Macintosh or Recovery
    2) Select Recovery. Choose Disk utility.
    3) Select the name of the drive/partition you want to erase on the left. If you have a Boot Camp partition or any other partition you'd  like to preserve, select "Macintosh...", otherwise, select the name of the drive. (this doesn't delete the recovery partition)
    4) choose the "Erase" tab. Verify that Format is set to "Macintosh OS Extended (Journaled)" and choose a name for the drive such as "Macintosh". click the "Erase..." button
    5) after the erase is complete press command+Q to return to the previous screen. Choose "Install Yosemite" and follow the instructions (this will be a fresh install)
    6) after the install is complete and you wish to restore your data, i do not recommend having Yosemite automatically restore your home folder as something in the Library of your home folder may be causing the spinning wheel.

  • How backup User and reinstall osx only

    My MacBook Pro (06 / 2009) running OSX 10.9 Mavericks didnt want to open completly this morning. 6 hrs later i havnt fix it. Reading and trying.
    -- How to make a backup now ?
    I want to save some création of mine. Last backup was 1 Month old on timemachine on external USB drive.
    -- How to reinstall OSX without deleting my User files and maybe my applications Adobe ?
    I have Osx 10.9 Mavericks on machine from free Apple update download. But computer came with 10.5.7 when order from Apple. Also bought 10.6 Snow Léopard  on CD.
    -- What i have done so far
    Reboot. Reset. Pram. Safe mode.
    Single user #reboot
    Single user # /sbin/fsck -FN
    Restart from installation CD to disk utility to verify disk
    Results : nothing
    Disk0s2: i/o error
    Invalid sibling link. The volume needs to ne repaired.

    I suspect it's a bad idea to boot from your Snow Léopard disk (even with the accent) to try to repair Mavericks.
    You could see if your hard drive will mount on another Mac in Target mode: How to use and troubleshoot FireWire target disk mode , then you could backup your créations.
    I would not backup anything more than your essential documents. If you restore system files, you will probably restore the problem.
    If you haven't already: Boot into your recovery partition (restart, hold down ⌘R until you see the Apple logo), and use Disk Utility to repair your hard drive. Repair permissions too while you're there. OS X: About OS X Recovery
    then restart.
    if that doesn't work, you could try the recovery partition again and reinstall Mavericks over your current installation.
    If you can't boot into your recovery partition, then try to boot into internet recovery: Hands on with Mountain Lion's OS X Recovery and Internet Recovery | Macworld , and use Disk Utility to repair your HD.  similarly, if that doesn't work, you could try to erase your HD from internet recovery and reinstall Mavericks.
    if that won't work, you could try TechTool, which can occasionally fix a problem that Disk Utility can't. Techtool Pro 7
    if that doesn't work, then your HD is probably failing and needs to be replaced.

  • Is a password required to format or reinstall OSX with or without disks?

    I'm worried about someone formatting or reinstalling my MacBook Air if it gets stolen so that I can't use iCloud to track it down. Is it possible to do any of this without my password? If so what safeguards can I use to prevent a format or reinstall without my permission?
    Thanks

    Using "Find My Mac", you can lock the system, rendering the system unusable without being unlocked at an Authorized Service Center, at which time it would be hoped that the center personnel follow procedure and contact the registered owner before unlocking.
    However, locking the system has one bad side effect. It prevents the owner from using Find My Mac to perform a location sweep, as it depends on the thief to use the guest account to sign on the internet, which he won't be able to do if the system is locked.
    I think the best bet is to decide how long you try and use the locating function, then resort to erasure and locking at some point.  Yes, the info will be lost, but that is one whopper of a reason to have a good backup regemin.

  • How to format and reinstall OS on mbp late 2009

    I'd like to format and reinstall operating system for my mbp 15 inch from internet (no startup CD required). What keys I should press when the mbp Startup?

    To access the recovery partition, turn the mac on and hold the option key down.  http://support.apple.com/kb/HT4718

  • How can I update to OSX Yosemite when product distribution file can not be verified?

    When I try to upgrade to OSX Yosemite I receive the following error message:
    We could not complete your purchase.
    The product distribution file could not be verified.  It may be damaged or was unsigned.
    Can someone help me with this issue?

    When I try to upgrade to OSX Yosemite I receive the following error message:
    We could not complete your purchase.
    The product distribution file could not be verified.  It may be damaged or was unsigned.
    Can someone help me with this issue?

  • Having software problem, Windows 7 Home, how to format and reinstall

    Having software problems, Windows 7.  I have the HP  P6510 desktop. I have backed up my data to ext. drive, and  I have the Windows 7 Home CD which I purchased. 
    Most of the reading I've done to "format & reinstall" seem to say I don't need to format...just put the Windows 7 CD in and restart...is that all I have to do...I don't have to format the HD?
    If I have to "format" the HD, how?
    PS:(Last time Computer was in for repair, they replaced the Windows 7 program so product numbers may be different.)

    Hi:
    You may want to read this step by step tutorial to install W7.
    http://pcsupport.about.com/od/operatingsystems/ss/windows-7-clean-install-part-1.htm
    However, to answer your question, you should not need to repartition or format the hard drive unless you want to.
    Windows 7 will install on the current windows partition creating a windows.old folder, which you can delete after W7 is installed.
    Having the windows.old folder is nice for folks like me who forgot to save a file or folder.  You can just browse to the Windows.old folder and retrieve any file or folder you want and copy it to the new windows installation.
    When you are sure you have gotten all of your files from the windows.old folder you can delete it by launching the disk cleanup utility and then click on the Cleanup System Files button in the disk cleanup window.
    Then just check the windows.old folder on the list of files and it will be deleted once you hit the OK button.
    If you delete partitions and reformat, you will lose the option of having the windows.old folder.
    The tutorial at the link above will step you thru the process of formatting the drive.

  • How to format and reinstall without install media

    I would like to "restore to factory" my mid-2010 MBP (17") .  Except of course I would like to have the 10.7 install and not have to start with 10.6 and then do the 4GB download again.  Is that possible?
    This is all to troubleshoot a performance issue with Final Cut Pro X.  If I do manage to pave my disk, will the AppStore still recognize me (ie I'm not interested in paying another $300+ for various AppStore purchases)  I'm assuming that once I log in with the same apple Id I used to make the purchase all should be good.

    ...not have to start with 10.6 and then do the 4GB download again....
    Since Lion deletes the installer after it's finished upgrading, you need to make a copy before hand.  Download the Lion installers and when it auto-starts, cancel the installer.  Then make a copy of the installer located in your Applications folder.  You can use this again on other machines in the future without having to download again.
    You can also make a clone of your SL install before installing Lion.  Make a clean install of SL, clone it, then upgrade to Lion.  Restoring a clone is almost always faster than installing from the install disks.  This is what I do when testing & troubleshooting many of my software issues.  (I usually doing that with virtual machines also.)
    If you want, you can make a Lion installer DVD or USB flash drive.  You can Google on how to make one of those, but realize that neither is supported by Apple.  And if you haven't purchased updated ones, you will still need your original disks that came with your Mac to reinstall any of the iLife apps that came with your Mac.

  • How to format and reinstall 10.6.8 without disk

    How to re-format my HD and reinstall 10.6.8 without a disk?

    Can't be done.   You have to either call AppleCare if you lost the original discs, call the seller of the machine if it wasn't Apple and say the discs belong to the machine and have them call AppleCare if they lost the discs. If clone your hard drive with Superduper or Carbon Copy Cloner upon purchasing a Mac with 10.6 you can always restore the clone at anytime.   And before considering upgrading, note 10.7 and above lack Rosetta:
    https://discussions.apple.com/docs/DOC-2465
    https://discussions.apple.com/docs/DOC-3761
    Macs newer than March 15, 2010 can't use the retail 10.6.3 installer, and must use the 10.6 installer that was pre bundled with them to install 10.6, if not a clone, and if pre bundled with some version of 10.6.  Prebundled with 10.7 Macs can't install 10.6 unless their actual hardware refresh date preceded 10.7's July 20, 2011 release.

  • HT4848 i forgot my password and i dont have a recovery disc.  how can i clean install OSX on my mac?

    please help
    i have a 2nd MAC OSX 10.5.3, but i cannot remember the admin password and i dont have a recovery disc.
    how can i do a clean install and get this working again?
    Thanks

    Here's how to reset an OS X password, and how to reset an Apple ID password.

  • How can I cleanly reinstall all Safari?

    My wife is having lots of issues with Safari on her iMac. Tabs don't open when told in preferences to do so, they only open a new window and display nothing but a blank page (I've even tried the command line tricks to fix this, it works once and then it fails again). She has pages that won't load for no apparent reason and my PC and Mac work fine, among other odd issues.
    I used +locate -i+ after a /usr/libexec/locate.updatedb as root to locate any file on my mac that had the word Safari in it. I then did a rm -rf on all of those files and reinstalled Safari. We still get the same issues.
    Am I missing something else? I'd like to completely remove Safari and reinstall. As a last resort I will install the OS over itself but I can't afford a clean install at this point because I can't back up her home directory right now. They only thing I'm backing up is her bookmarks.

    Hi,
    Try troubleshooting the Safari .plist file.
    Quit Safari (Commadn + Q)
    Open a Finder window. Select your Home Folder in the Sidebar on the left. It has a small house icon. Then open the Library folder then the Preferences folder.
    Move the com.apple.Safari.plist file from the Preferences folder to the Desktop.
    Now launch Safari. See if that makes a difference.
    And empty the Safari cache more often. Command + Option + E
    Check Safari / Preferences - Extensions. Might be an Extension causing the problem.
    And if nothing above has helped, try troubleshooting third party Safari add ons.
    http://support.apple.com/kb/TS3230?viewlocale=en_US
    Uninstalling and reinstalling Safari doesn't always help.
    And login to another account. Try Safari there. Same behavior then check the startup disk for errors.
    Click here: Then click: *Try Disk Utility*
    http://support.apple.com/kb/TS1417
    Carolyn

  • How do you clean up osx

    IMac running OSX MOUNTAIN LION keeps getting slower and slower, how can this be addressed?

    First, back up all data immediately, as your boot drive might be failing.
    Step 1
    This diagnostic procedure will query the log for messages that may indicate a system issue. It changes nothing, and therefore will not, in itself, solve your problem.
    If you have more than one user account, these instructions must be carried out as an administrator. I've tested them only with the Safari web browser. If you use another browser, they may not work as described.
    Triple-click anywhere in the line below on this page to select it:
    syslog -k Sender kernel -k Message CReq 'Channel t|GPU D|I/O|find tok|n Cause: -' | tail | open -ef
    Copy the selected text to the Clipboard (command-C).
    Launch the Terminal 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 Terminal in the icon grid.
    Paste into the Terminal window (command-V).
    The command may take a noticeable amount of time to run. Wait for a new line ending in a dollar sign (“$”) to appear.
    A TextEdit window will open with the output of the command. Normally the command will produce no output, and the window will be empty. If the TextEdit window (not the Terminal window) has anything in it, stop here and post it — the text, please, not a screenshot. The title of the TextEdit window doesn't matter, and you don't need to post that.
    Step 2
    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 a portable computer, check the cycle count of the battery. It may be due for replacement.
    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. See whether there's any change.
    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.
    If you're booting from an aftermarket SSD, see whether there's a firmware update for it.
    If you have a MacBook Pro with dual graphics, disable automatic graphics switching in the Energy Saverpreference pane for better performance at the cost of shorter battery life.
    Step 3
    When you notice the problem, 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 4
    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.

  • Help to do Clean install OSX Mavericks

    I am using osx Mavericks now by upgrading from osx Mountain Lion, I am not feeling better after upgrading, so decided to clean install Mavericks on my Macbook Pro13' 2012 model.Can anyone please assist me to do clean install osx with directions means step by step or picture view.If anyone help me to do this i fell

    The default solution for installing OS X Mavericks is to download it free app store and then perform an upgrade from a previous version of Mac OS X, whether that’s from Mountain Lion or Snow Leopard. Upgrades are fast, efficient, and most important, very easy, and that’s the recommended option for the vast majority of Mac users. Nonetheless, some users may want to start fresh with a blank slate, using what’s known as a “clean install” and that’s what we’re going to cover here. Performing a clean install can be desirable for a variety of reasons, from ditching years of built-up cruft on older Macs from many years of OS X upgrades, to troubleshooting difficult issues, to transferring ownership of a Mac to a new owner.
    The process of a clean install is not difficult if you follow these instructions, but because it involves formatting the Macs hard drive, it can result in extra work. Since the Mac will start with a clean slate, all apps must be downloaded and installed again, important documents and personal data must be manually transferred back over from backups, and system settings must be customized again. This typically makes it more appropriate for advanced users or for select situations (like selling a Mac), and thus it should not be considered a standard upgrade path to get to OS X 10.9 Mavericks.
    Warning: Performing a format and clean install of OS X will erase the Macs hard drive and all contents on the drive will be removed. All files, applications, documents, photos, customizations, everything on the computer will be lost in this process. Understand this and know what you are doing, and why, to prevent data loss of critical files. We can not reiterate this enough.
    How to Format & Clean Install OS X Mavericks on a Mac
    You will need a bootable OS X 10.9 installer drive to accomplish a clean Mavericks install using this method. You can learn how to easily create one here if you haven’t done so yet.
    Back up the Mac first with Time Machine or by manually backing up your important data – do not skip this step or else you will not be able to recover files
    Connect the bootable OS X Mavericks installer drive to the Mac and reboot the computer
    Hold down the OPTION key during boot until you see the boot selector menu, then choose “Install OS X Mavericks”
    At the “OS X Utilities” screen, choose “Disk Utility”
    Select the hard drive or partition to format from the left menu, then choose the “Erase” tab
    Select format type “Mac OS Extended (Journaled)”, give it a logical name (like Macintosh HD), and choose “Erase”, confirm to erase at the next screen
    When finished erasing the disk, quit out of Disk Utility to return to the normal boot menu
    From the “OS X Utilities” menu, now choose “Install OS X”, click “Continue” and agree to the terms of service, and select the freshly formatted “Macintosh HD” drive to begin the clean install process
    (Excuse the unusual picture quality, some images taken with an iPhone 5 during the boot install process where screen shots are not allowed)
    A clean installation of OS X Mavericks takes about 35-45 minutes to complete, depending on the speed of the install drive and the volume OS X is being installed onto. When Mavericks is finished installing, the Mac will reboot itself automatically and go through the initial setup process for OS X Mavericks. Register, create a user login, set the Apple ID and iCloud details, and you’re all done. You’ll boot directly to a very blank OS X installation, similar to the experience of getting a brand new Mac.
    A fresh OS X installation is very bare with just about nothing included outside of the core system and basic Mac apps (intentionally so), thus any custom applications or apps you had previously downloaded from the web or App Store will need to be downloaded and installed again. For apps from the Mac App Store, that’s fairly easy, but for third party apps you will need to access them independently through the developers.
    If you are keeping the Mac yourself, you will probably want to transfer your old data, documents, photos, and files back onto the Mac. This is a good time to access Time Machine to selectively restore certain files, or access backups made to network drives, DropBox, CrashPlan, external backup drives, USB flash disks, whatever your preferred backup method is and from where ever stored your data.
    SRC - http://osxdaily.com/2013/10/26/clean-install-os-x-mavericks/ 
    <Edited By Host>

Maybe you are looking for