How To Reinstall Mac Os X Sierra?

You can reinstall macOS Sierra or macOS High Sierra by doing the following:

  1. Back up the Mac before beginning.
  2. Reboot the Mac and hold down COMMAND + R keys concurrently right after you hear the boot sound, this will boot the Mac into Recovery Mode.
  3. At the “macOS Utilities” screen choose “Reinstall macOS”

Contents

How do I factory reset my Mac OS X Sierra?

Choose Apple menu > Shut Down, press and hold the power button until “Loading startup options” appears, select Options, click Continue, then follow the onscreen instructions. In the Recovery app window, select Reinstall for your macOS release, click Continue, then follow the onscreen instructions.

How do I do a clean install of Mac OS X Sierra?

How to Perform a Clean Install of macOS High Sierra

  1. Step 1: Backup Your Mac. As noted, we’re going to completely erase everything on the Mac.
  2. Step 2: Create a Bootable macOS High Sierra Installer.
  3. Step 3: Erase and Reformat the Mac’s Boot Drive.
  4. Step 4: Install macOS High Sierra.
  5. Step 5: Restore Data, Files and Apps.

How do I manually reinstall Mac OS X?

Reinstall macOS

  1. Install the latest version of macOS compatible with your computer: Option-Command-R.
  2. Reinstall your computer’s original version of macOS (including available updates): Option-Shift-Command-R.
  3. Reinstall your current version of macOS: Command-R.

How do I reinstall OSX without disc?

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 an old Mac OS?

Here are the steps Apple describes:

  1. Start up your Mac pressing Shift-Option/Alt-Command-R.
  2. Once you see the macOS Utilities screen choose the Reinstall macOS option.
  3. Click Continue and follow the on-screen instructions.
  4. Select your startup disk and click Install.
  5. Your Mac will restart once the installation is complete.

How do I restore my Mac to factory settings without recovery mode?

Restart your Mac while holding down the ‘Option+Command+R’ keys. Release these keys as soon as you see the Apple logo. Once your Mac boots, you should see a spinning globe and the message ‘Starting Internet Recovery.

How do I install macOS Sierra after download?

How to Download and Install macOS Sierra

  1. Go to this link (or through the App Store) to get to the download page.
  2. Click “Download” and wait while it downloads.
  3. Click Continue in the macOS installer.
  4. Agree to the terms and conditions.
  5. Click Agree in the pop-up box.
  6. Click Install when it shows your boot drive.

Can I delete install macOS Sierra from applications?

It is safe to delete, you will just be unable to install macOS Sierra until you re-download the installer from the Mac AppStore. Nothing at all except you would have to download it again if you ever need it. After install, the file would usually be deleted anyway, unless you move it to another location.

How do I reinstall macOS High Sierra without losing data?

How to Update & Reinstall macOS Without Losing Data

  1. Start up your Mac from macOS Recovery.
  2. Select “Reinstall macOS” from the Utilities Window and click “Continue”.
  3. Follow the onscreen instructions to select the hard drive you want to install the OS on and start the installation.

Does reinstalling Mac delete everything?

Reinstalling Mac OSX by booting into the Rescue drive partition (hold Cmd-R at boot) and selecting “Reinstall Mac OS” does not delete anything. It overwrites all system files in-place, but retains all your files and most preferences.

Does reinstall macOS erase data?

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.

Can you install Mac OS from USB?

Use an external drive or USB to install a fresh copy of macOS. Using an external drive, you can install or reinstall the Mac operating system on a supported device. Apple recommends only system administrators follow these steps since a bootable installer isn’t necessary to update or even reinstall macOS.

How do I reinstall OSX without Apple ID?

macrumors 6502. If you install the OS from a USB stick, you don’t have to use your Apple ID. Boot from the USB stick, use the Disk Utility before installing, erase your computer’s disk partitions, and then install.

Can macOS be downgraded?

There are two ways to downgrade your Mac to a previous version. You can restore through Time Machine or install macOS from a USB. Taking the Time Machine route is the easiest, although this assumes you have a Time Machine backup of your system that pre-dates your installation of macOS Big Sur.

How do I install a new Mac operating system?

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.

What is the Command and R keys on a Mac?

Command (⌘)-R: Start up from the built-in macOS Recovery system. Or use Option-Command-R or Shift-Option-Command-R to start up from macOS Recovery over the internet.

What came after Mac Sierra?

Releases

Version Codename Processor support
macOS 10.12 Sierra 64-bit Intel
macOS 10.13 High Sierra
macOS 10.14 Mojave
macOS 10.15 Catalina

Can’t install macOS Sierra?

macOS Sierra problems: Not enough space to install
If you get an error message while installing macOS Sierra saying that you don’t have enough hard drive space, then restart your Mac and boot into safe mode. To do this, turn off your Mac and wait 10 seconds, the press the power button.

How do I install Sierra on an old Mac?

If you store them in the cloud or an external drive, they will be safe, and you will avoid any data loss.

  1. Prepare your USB drive. Insert the USB drive; Open Disk Utility.
  2. Use MacOS High Sierra Patcher. Open MacOS High Sierra Patcher;
  3. Install Mac OS High Sierra. Install MacOS normally and boot back into the installer drive;

Is my Mac too old to update?

Apple said that would run happily on a late 2009 or later MacBook or iMac, or a 2010 or later MacBook Air, MacBook Pro, Mac mini or Mac Pro.This means that if your Mac is older than 2012 it won’t officially be able to run Catalina or Mojave.