When installing Mountain Lion OS will it erase all on my computer?

Will the installation of Mountain Lion OS wipe out the pictures and documents on my computer?

If everything works perfectly, it should not do anything but overwrite the old operating system with the new one.
Having said that would you trust you data to eveything working perfectly. I don't know about you but I don't. In fact I actually backup my data twice using different software for each backup just in case.
So the decision is yours. How trusting are you?
Allan

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    After installing Mountain Lion, contacts will not sync to iphone 3G

    I have the same problem... but when i connect my MacBook Pro late 2009 on my cousin internet the facebook page works normaly. but when i reconnect in my wifi it stops to work again... and it only hapens with macbook pro, On my iPad, iPhone and PC the facebook page works properly. And another thing, when my counsins bring their Macbooks to my network, it stops to enter on facebook too... I already reset my router config everything and facebook dont work with anything with mountain lion... My router is a linksys wag200n and the problem started when i install mountain lion. Thanks for help and sorry for bad english xD.

  • I've just installed mountain lion and my files are all out of their previous folders. Can I set them back or do I need to manually put them back in order??

    I've just installed mountain lion and my files are all out of their previous folders. Can I set them back or do I need to manually put them back in order??

    Hi Thomas,
    Thanks for the response.  So, after the computer did it's restart thing after installing I went into finder where I usually have everything come up including my Macintosh HD folder and all it's folders and files.. Anyway it was this that hadn't come up and all the files were listed under All My Files and out of all their folders.  I totally switched the computer off after posted the problem and now having switched it back on I see that it's all there and in it's proper files. 

  • After installing mountain lion facebook will not load on iMac

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  • Error when installing Mountain Lion.  I'm stuck...

    I'm trying to install Mountain Lion to my iMac.  After getting the instalation under way I returned to see an error.  I tried to reinstall in and had no joy.  I read a few things on the discussions and so have tried to repair my disk in DU - after verryify disk the repair option is greyed out.  I've tried to erase my disk and start over, but I can't get it to 'unmount'.  I've tried to restore from my time machine but get an error message about volume's being used.  I've read the info in the little operations manual about repairing, restoring and reinstalling and tried that. Nothing.
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    This says Snow Leopard, but it applies to Lion as well.
    From Kappy
    Install Mountain Lion Successfully from 10.6.8

  • Time machine question when installing Mountain Lion

    I have a 2010 iMac running OS X 10.6.8 Snow Leopard.
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    No, and yes.

  • When installing mountain lion on my computer, why does it say "OSX Mountain Lion couldn't be installed, because the disk \ is damaged and can't be repaired."

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    http://support.apple.com/kb/DL1399
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  • HT1848 when I download this update will it erase all my totals in Angry Birds?

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  • Got a new macbook, when i sync my iPod, will it erase all my songs

    So will it erase all my songs when i sync it to my new macbook?

    Yes.  An iPod is designed to only sync with one iTunes library/computer at a time.  If you try to sync it with a new computer/iTunes library it will erase what is currently on the iPod and replace it whatever is in the new library empty or not.
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  • "Repair disk" when installing Mountain Lion

    I was just upgrading to Moutain Lion OS X right now when it tells me my disk needs repair. I tried, but it says "Macintosh HD couldn't be verified properly" (might not be exact wording, it's in Norwegian for me). When I click the "repair disk" button nothing happens, it just gives me the same message.
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    Then quit the Mountain Lion installer. Do you have a bootable system on your external hard drive? If so, then boot from it as follows:
    Boot Using OPTION key:
    Restart the computer.
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    Release the key when the boot manager appears.
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    Click on the arrow button below the icon.
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    Open Disk Utility from the Utilities folder. After DU loads select your internal hard drive entry (mfgr.'s ID and drive size) from the the left side list.  In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive.  If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU.
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    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.
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    Drag the mounted disc icon from the Desktop into the Source entry field.
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  • How do I install Mountain Lion on an accidentally erased drive?

    Honestly, I feel such a fool...
    My new MBA arrived and I tried to migrate from my old one via wifi.  It stalled, so I decided to migrate from the most recent TimeMachine backup on an external Thunderbolt disk.  That finished, but the new MBA looked nothing like the old MBA and apps did not work the same, so I decided to go back to square one...
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    This is two days of frustration.  I am not near an Apple Store, so cannot vent my frustration - not to mention humiliation - on anyone "real".
    I have a brand new, apparently bricked, MBA.  I have my old, still functioning, MBA.  I have a 1Tb Thunderbolt disk which is partially used, a 500Gb USB disk which is partially used and a USB multireader with assorted SD cards etc.  What can I do?  Stop bashing my head against the wall would be a start, I suppose.
    PS - I have tried using Target Disk Mode via the Thunderbolt cable to reformat and install OS X to the SSD, having googled a lot (too much!) but have achieved nothing.  It seems as though the new MBA, because it shipped with Mountain Lion preloaded, refuses to acknowledge any attempt to install it externally/remotely.  Do I have no option but to return it to Apple?
    Thank you!
    Message was edited by: ianbl

    Well, I opened the case again with Apple and this time they did call.  A very helpful chap called Gerry has set up an appointment for me at an Apple Store tomorrow.  The drive will be worth it, I'm sure.
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    With the new MBA I had got as far as registering it to my Apple ID and setting up messaging, App Store, FaceTime and all those other things that need the ID, so it should have been recognised as being mine and legitimate.
    Anyway, thank you for the support - I hope nobody else tears as much of their hair out as I have over this.  A little knowledge is a dangerous thing...

  • Unable to install Mountain lion after defense grade erase

    Hello All,
    I just sold my 13-inc macbook pro on eBay. As I am paranoid about my privacy, I decided to do a "defense-grade" erase. It took 10 hours after doing a 7 pass process. However, I am unable to install anything on it (Mountain Lion, Lion, Ubuntu). When I try to install Mac OSX I get the error, "Error installing OS X, try reinstalling".  Huh??
    Please let me know what I should do. Can I not install anymore? Should I get a new one?
    Thanks,
    Singlebinary
    Message was edited by: singlebinary

    Here's what I did:
    Plugged in my USB drive and started the computer with the option key pressed. I get one choice "Install OS X" which is from my USB drive. After I got an error message, I can cancelled it and under tools selected "Disk Utility". I then selected one partition and the default P table of GUID. So, this has already been done to the drive.
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    Looking at the Installer Log errors, I find the following lines:
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    1 display(s) found.
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    @(#) PROGRAM: OS X Installer PROJECT:OSInstaller-419
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    Couldn't find OS X (server) install data.
    2013-03-31 07:24:05.685 OS X Installer[317:707] *** WARNING: -- [NSImage CompositeToPoint:fromRect:operation:] is deprecated in MACOSX 10.8 and later. Please use - [NSImage drawAtPoint:fromRect:operation:fraction:] instead
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    Singlebinary

  • Applications stay when installing mountain lion?

    when I update to mountain lion do I lose old applications/have to reinstall 3rd party software?

    No it will not erase any third party applications. That said, you should always have a good backup to restore from in case of any problems at any time.
    Check to be sure your older apps are compatible with ML.
    http://roaringapps.com/apps:table

  • What do I need to watch out for when installing Mountain Lion from scratch?

    I feel like it's a good moment to erase everything from my computer and reinstall Mountain Lion. I'd like to know which things I should watch out for.
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    Alright, I'm slowly getting ready to do this. Apparently I do not need an install DVD but I can just press CMD+R to get to the option to do a fresh install, that's why my Mac didn't come with an install DVD (that's what I've read and what I've been told at least).
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  • Error when installing Mountain Lion

    I bought mountain lion in the app store and when I downloaded and restarted my computer it said my hard drive was damaged, unable to install.  Anything I can do to fix this?  Can I get a refund?

    the app store policy is no refunds, but you can try: http://gizmodo.com/5886683/how-to-get-a-refund-from-the-app-store

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