Question: How do I reinstall my Apple operating system?

How do I reset my Apple operating system?

Shut down your Mac, then turn it on and immediately press and hold these four keys together: Option, Command, P, and R. Release the keys after about 20 seconds. This clears user settings from memory and restores certain security features that might have been altered.

How do I reinstall Mac OS manually?

Install macOS

  1. Choose Reinstall macOS (or Reinstall OS X) from the utilities window.
  2. Click Continue, then follow the onscreen instructions. You’ll be asked to select your disk. If you don’t see it, click Show All Disks. …
  3. Click Install. Your Mac restarts after installation is complete.

How do I reinstall my operating system?

How do I reinstall my OS software?

  1. Check your computer hard drive. You should be able to find a “restore” function on this drive if it has not been removed.
  2. Follow the prompts. …
  3. If you don’t have a reinstallation function on your hard drive, check your equipment to see if you have Windows install/restore discs.

How do I reinstall OSX without disc?

The procedure is as follows:

  1. Turn your Mac on, while holding the CMD + R keys down.
  2. Select “Disk Utility” and click on Continue.
  3. Select the startup disk and go to the Erase Tab.
  4. Select the Mac OS Extended (Journaled), give a name to your disk and click on Erase.
  5. Disk Utility > Quit Disk Utility.

How do I install OSX on new hard drive from USB?

Insert the flash drive in a USB port on your Mac. Start the Mac and hold down the option key. Select to boot from the flash drive. Use the Disk Utility application to create a single partition to install El Capitan (OS X 10.11).

How do I install a new operating system on my Mac?

It is the easiest way to install a fresh copy of an operating system.

  1. Connect your Mac to the internet via Wi-Fi or Ethernet.
  2. Click on the Apple icon in the upper left corner of your screen.
  3. Select Restart from the drop-down menu.
  4. Hold down Command and R (⌘ + R) at the same time. …
  5. Click on Reinstall a new copy of macOS.

Will I lose data if I reinstall macOS?

2 Answers. Reinstalling macOS from the recovery menu does not erase your data. However, if there is a corruption issue, your data may be corrupted as well, its really hard to tell. … Reinatalling the os alone does not erase data.

How do I reinstall macOS Online?

How to use Internet Recovery to reinstall macOS

  1. Shut down your Mac.
  2. Hold down Command-Option/Alt-R and press the Power button. …
  3. Hold down those keys until you a spinning globe and the message “Starting Internet Recovery. …
  4. The message will be replaced with a progress bar. …
  5. Wait for the MacOS Utilities screen to appear.

How do I reinstall OSX without Internet?

Command R – Install the latest macOS that was installed on your Mac, without upgrading to a later version. Shift Option Command R – Install the macOS that came with your Mac, or the version closest to it that is still available.

How do I replace my hard drive and reinstall operating system?

How to Replace a Hard Drive and Reinstall an Operating System

  1. Back up data. …
  2. Create a recovery disc. …
  3. Remove the old drive. …
  4. Place the new drive. …
  5. Reinstall the operating system. …
  6. Reinstall your programs and files.

How do I restore my operating system from a hard drive?

Step 1: Create a bootable media

  1. Select “System Crash Data Recovery”
  2. Choose a USB drive mode.
  3. Format the USB drive.
  4. Create the bootable drive.
  5. Choose the OS hard drive.
  6. Scan the OS hard drive.
  7. Retrieve data from hard drive.

How do I fix missing operating system on my computer?

5 Solutions That May Help You Get out of Missing Operating System Error

  1. Solution 1. Check If Hard Drive Is Detected by BIOS.
  2. Solution 2. Test Hard Disk to See Whether It Failed or Not.
  3. Solution 3. Set BIOS to Default State.
  4. Solution 4. Rebuild Master Boot Record.
  5. Solution 5. Set Correct Partition Active.

How do I restore my Mac without reinstalling operating system?

How to Wipe Everything Off a Hard Drive Except the OS

  1. Windows. Click the Start button and select “Control Panel.” …
  2. Mac. Click the Apple menu and select “Restart.” Hold down “Command-R” while your Mac restarts. …
  3. Manual Restoration on Windows. …
  4. Manual Restoration on Mac.

How do I reinstall Mac startup disk?

Restart your Mac, and press Command + R, while it’s restarting. Select Disk Utility from the macOS Utilities menu. Once Disk Utility has loaded, choose the disk you wish to repair – the default name for your system partition is generally “Macintosh HD”, and choose ‘Repair Disk’.

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