Quick Answer: How To Reinstall Mac Os X Sierra?

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

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

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

So, let us begin.

1. Step 1: Clean up your Mac.
2. Step 2: Back up your data.
3. Step 3: Clean Install macOS Sierra on your startup disk.
4. Step 1: Erase your non-startup drive.
5. Step 2: Download the macOS Sierra Installer from the Mac App Store.
6. Step 3: Start the Installation of macOS Sierra on the Non-startup drive.

How do I completely reinstall Mac OS X?

How to reinstall MacOS via Recovery

• Start up your Mac while holding down Command+R until you hear the startup chime and see either a spinning globe or Apple logo.
• A macOS Utilities window will open, on which you will see the options to Restore From Time Machine Backup, Reinstall macOS, Get Help Online and Disk Utility.

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 do a clean install of OSX?

Restart and Install

• Use the mouse pointer or the arrow keys on your keyboard to select the disk called “Install macOS Sierra” in the drive list that appears on the screen.
• Once the USB drive has booted, select “Disk Utility” from the Utilities window, choose your Mac’s startup drive from the list, and click “Erase”.

Could not find installation information for this machine?

If you are installing mac os on a fresh Hard Drive then rather pressing cmd + R on startup, you need to press and hold only alt/opt key on system startup. In Recovery Mode you have to format your Disk using Disk Utility and Choose OS X Extended (Journaled) as drive format before you click Reinstall OS X.

How long does it take to reinstall Mac OS?

Depends on what kind of Mac you have and method of install. Typically, if you have a stock 5400 rpm drive, it takes about 30 – 45 minutes using a USB installer. If you are using the internet recovery route, it can take over an hour, depending on speed of internet etc.

How do I reinstall Mac OS without recovery mode?

Restart your Mac while holding down the ‘Command+R’ buttons. Release these buttons as soon as you see the Apple logo. Your Mac should now boot into Recovery Mode. Select ‘Reinstall macOS,’ and then click ‘Continue.’

Does reinstall macOS erase data?

Technically speaking, simple reinstalling macOS won’t erase your disk either delete files. You probably don’t need to erase, unless you’re selling or giving away your Mac or having an issue that requires you to wipe.

How do I reinstall Mojave on Mac?

How to install a new copy of macOS Mojave in Recovery Mode

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.

How do I do a clean install of OSX Mojave?

How to Clean Install MacOS Mojave

• Complete a full Time Machine backup before starting this process.
• Connect the bootable macOS Mojave installer drive to the Mac via a USB port.
• Reboot the Mac, then immediately start holding the OPTION key on the keyboard.

How do I restore my Mac to factory settings?

Step-by-step Guide to Reset Mac to Factory Settings

1. Restart in Recovery Mode.
2. Erase Data from Mac Hard Drive.
3. a. In the macOS Utilities window, choose Disk Utility and click Continue.
4. b. Choose your startup disk and click Erase.
5. c. Choose Mac OS Extended (Journaled) as the format.
6. d. Click Erase.
7. e. Wait until the process is finished.
8. Reinstall macOS (optional)

Why won’t Mojave install on my Mac?

Another common macOS Mojave download problem shows the error message: “Installation of macOS could not continue. To make sure you do, open up the Apple menu and click on ‘About This Mac.’ Select ‘Storage’ and then check to make sure you have enough space on your hard drive. You need at least 12.5GB free.

How do I boot a Mac in Safe Mode?

Start the system in Safe Boot mode

• Restart the Macintosh. Press and hold the Shift key immediately after you hear the startup tone.
• Release the Shift key when the Apple logo appears. Safe Boot appears on the Mac OS X startup screen.

How do I fix a Mac installation error?

What to do if your Mac freezes during software installation

1. Shut down, wait a few seconds, then restart your Mac.
2. Go to the Mac App Store and open Updates.
3. Check the Log screen to see if files are being installed.
4. Try installing the Combo update.
5. Install in Safe Mode.
6. 6. Make some room.
7. Reset the NVRAM.

How do I reinstall Mojave on Mac without disc?

How to Reinstall MacOS Mojave

• Backup the Mac before going any further, do not skip making a full backup.
• Restart the Mac, then immediately hold down the COMMAND + R keys together immediately to boot into macOS Recovery Mode (alternatively, you can also hold down OPTION during boot and select Recovery from the boot menu)

How do I reinstall Mac from recovery partition?

Reinstall Mac Operating System From The Recovery Partition

1. Turn on the Mac and immediately press and hold down both the Command key and the R key.
2. Once you see the Apple logo appear in the middle of the screen you can release the Command and R keys.
3. When the Mac has completed its startup, you should see a window similar this one:

How do I restore my Mac without a recovery partition?

Method 1: Using Internet Recovery to Reinstall OS X

• Turn off your Mac.
• Hold Command + Option + R and click Power button.
• Keep holding the keys you see a spinning globe and a message “Stating Internet Recovery.
• Then, this message will be replaced with the progress bar, wait until the progress bar fills or completes.

Will I lose my data if I reinstall Mac OS?

To reinstall macOS, including the latest Mojave, without losing data, you can follow the professional guide to update the OS, which will not cause data loss in most of the case. If you still have worries, back up your Mac in advance or recover the lost files with EaseUS Data Recovery Wizard.

Does reinstalling macOS erase everything?

“Generally you don’t need to erase your startup disk to reinstall macOS,” explains Apple. This will erase all the information from the disk, including your personal data. Tip: Click Security Options to select options for securely erasing the disk.

When should I reinstall OSX?

Reinstall your computer’s original version of macOS from the Internet: Press and hold Shift-Option-Command-R until a spinning globe appears, then release the keys. This option reinstalls the most recent version of macOS that came with your computer, including any available updates to that version.

How do I restore my Mac to factory settings without password?

Press the Command and R keys at the same time when the grey screen appears and hold them until you see the Apple logo. A small loading bar will appear under the logo. Sit tight as your system boots into Recovery Mode. Click the Utilities tab in the top menu bar, select Terminal, type resetpassword and press Enter.

How do you restore a Mac?

How to restore your Mac from a local backup

1. Restart your Mac.
2. While the startup disc is waking up, hold down the Command and R keys simultaneously.
3. Click on Disk Utility.
4. Click Continue.
5. Select your Mac’s hard drive.
6. Click the Restore tab at the top of the Disk Utility window.

How do I start my Mac in recovery mode?

How to enter Recovery Mode. 1) In the Apple menu choose Restart, or power on your Mac. 2) As your Mac restarts, hold down the Command (⌘) – R combination immediately upon hearing the startup chime. Hold the keys until the Apple logo appears.

Photo in the article by “Flickr” https://www.flickr.com/photos/dullhunk/29935790351