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How do you reinstall the os - Apple Mac OS X

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Insert system disk, then select restart. or


install disk, hold power button down until machine shuts off. then hold down c key and push power button. Hold c key while machine boots from optical drive.

Posted on Jul 25, 2014

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Macs shipped after July of 2011 don't include system discs.

To reinstall the OS on Macs made since then, you need to use OS X Recovery.

Here's how:

  1. Turn on (or restart) the Mac while holding down ?-R (Command-R).
  2. Continual holding down both keys until you see the Apple logo in the middle of the screen.
Eventually you'll see the recovery screen, from which you can reinstall the OS.

Note that if you've just installed a new hard drive, it won't have the recovery partition installed. In this case, you'll need to be connected to an Ethernet or Wi-Fi network. It will download the operating system from Apple's servers. This is called Internet Recovery, and it can take much longer, depending on the speed of your internet connection.

If Internet Recovery isn't working, for some reason, you can force your Mac into internet recovery mode by holding down the ?-?-R (Option-Command-R).

Posted on Nov 27, 2014

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Posted on Jan 02, 2017

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Related Questions:

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How to reswtore to factory settings in Dell computer without disc



Why you want to reinstall the OS:

* System affected by virus,worms,spams and bluescreen

* Any OS issues and you are not able to get into windows


How to reinstall the OS:

* Normally in a computer to reinstall OS and the drivers it may take about minimum of 1 hour but using the dell partition we can do it in 25 mins and you don't need to install drivers seperately

To reinstall OS (Windows XP):

* While turning on the computer in the Dell screen you need to press control +F11 keys simultaneously

* Once you do that it will take you to a different screen were it will ask for your confirmation to reinstall the OS

* Once you confirm it the reinstallation will take place and the computer will reboot

* After that you will be prompted to provide informations like date and time zone,computer name and such things

* After this it will get into the regular desktop screen..

* All the drivers will be preinstalled other than the softwares that you installed on the computer

To reinstall OS (Win Vista or Win 7):

* While turning on the computer in the Dell screen you need to press the F8 key

* This will take you to the advance boot option were you need to select Repair my computer

* After that you need to select the Dell image restore or Dell factory restore

* Follow the onscreen instructions and it will ask for your confirmation to reinstall the OS

* Once you confirm it the reinstallation will take place and the computer will reboot

* After that you will be prompted to provide informations like date and time zone,computer name and such things

* After this it will get into the regular desktop screen

* All the drivers will be preinstalled other than the softwares that you installed on the computer


Note: Please take a backup of all the files before reinstalling the OS

If you dont have the default dell partition then you need to reinstall the OS using the CD



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1 Answer

My laptop won't load the repair menu (or any thing from the start)


This error code means that the OS need to re reinstalled............ Use the following link to reinstall the OS and the drivers very easily
http://findtechhelp12.blogspot.com/2010/11/how-to-reinstall-os-in-dell-computer.html

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Black Screen in start up evern in Safe Mode a black screen apears! Dell Inspiron 1525. OS-Windows Xp


This error means that the OS need to re reinstalled............ Use the following link to reinstall the OS and the drivers very easily
http://findtechhelp12.blogspot.com/2010/11/how-to-reinstall-os-in-dell-computer.html

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Os reinstallation /repair


Yes try to do so, select boot from CD using OS CD, follow the instruction, after searching previous Operating System type "r" to repair the OS

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Can't boot OS because of file missing


You will need to reinstall the file from an OS installation disc. You may have to reinstall the entire OS. If you need to, you should be able to keep any documents and other data you have on the computer, so long as you are reinstalling the same OS. If you want to upgrade to a different one, however, I would recommend that you use another device to boot your computer (a cd, external hard drive, or flash drive with the same OS you have on you computer), and copy all the desired data from you computer onto another storage device before upgrading. It is complicated to just replace the file manually, and it still requires a resource with the file on it (such as the installation disc), so your best would be to just reinstall the OS, or changing the OS.

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Bluetooth device not working after windows got reinstalled


What is the old OS and the new OS of your computer? If you upgraded your system, there's a possibility that your Blyetooth device was not supported by your new OS.

Or, you might need to download a new driver that would support your new OS.

Byt if you are running the same OS, try to download the driver from the Internet and reinstall the Bluetooth driver.

Have a great day!

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How can i reset my computer as brand new


You will need to format your harddrive and reinstall your operating system

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Reinstall OS Windows XP home edition


If you have all the reinstallation discs, please follow the steps at this link: http://tinyurl.com/3yq66w

Please let us know if helps you fix the problem.

Thanks,

Karlox

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