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Mac answer: Your hard drive might be damaged. Boot up your mac with the DVD-disc or USB-drive that came with your mac and let Disk Utility try to repair your drive.

If successful you will be able to start your Mac again as normal.

If you are on Apple Care or if you are on your first year within purchase, it is advised to backup as much data as possible before taking it to an Apple Certified Repair shop to get yourself a new Hard drive. Save

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Q: What to do if your computer displays a message operating system not found when you turn it on?
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Related questions

What type of errors present as the computer system booting successfully but reports an error message when loading the operating system?

operating system startup error


What does it mean when your computer gives you a msmgr message?

If you do not have msmgr open and you still get the message then it means your computer needs to be patched . You need to update your windows operating system


What are the main functions of the operating systems?

Without an operating system, a computer would not operate, and a blank screen with a message (something like) system not found, would be the result.


What will happen if a computer does not have operating system?

A computer without an operating system will not operate.


Difference between operating system and microprocessor?

An operating system is like Windows, Windows 2000, Windows XP, it's the controlling software of your computer. A microprocessor is the CPU, the brain of the computer. It does all the commands, does all the math, and displays the answers on you monitor. So the CPU is called hardware because it is an actual chip, while the operating system is called software because it is millions of lines of computer code.


What is the mean of operating system?

operating system decide what your computer will do


What is operating system and what is the uses of operating system?

An operating system manages the working operation of a computer


What operating system works on a desktop computer notebook computer or mobile computing device?

operating system is a complete operating system that works on a desktop computer, a notebook computer, or mobile computing device.


What happens to a computer without an OS?

It sits doing nothing, usually displaying a message from the BIOS that an operating system could not be found.


What operating system allows users to communicate with the computer system?

Most operating systems native to the computer system allows users to communicate with the computer system


What is opereating system?

An operating system runs common services for computer programs and manages the computer hardware resources. An operating system is necessary to run application programs.


Definition of operating software?

An operating system (OS) is system software that manages computer hardware and software resources and provides common services for computer programs. The operating system is a component of the system software in a computer system. Application programs usually require an operating system to function.