How To Reinstall Os X?

Step 4: Reinstall a clean Mac operating system

• Restart your Mac.
• While the startup disc is waking up, hold down the Command+R keys simultaneously.
• Click on Reinstall macOS (or Reinstall OS X where applicable) to reinstall the operating system that came with your Mac.
• Click on Continue.

Before you move on to reinstalling OS X, try a few of these tips:

• Reset your PRAM. Shut down your Mac and hold down Command-Option-P-R during boot. Wait for the chimes and let go.
• Check your keyboard (especially if it’s a Bluetooth keyboard). Try using a wired keyboard if possible.

Select your startup drive on the left (typically Macintosh HD), switch to the Erase tab and choose Mac OS Extended (Journaled) from the Format drop-down menu. Select Erase and then confirm your choice. Quit out of the Disk Utility app, and this time choose Reinstall OS X and Continue.Step 3: Erase macOS High Sierra

• Connect your Mac to the internet via Wi-Fi or Ethernet.
• Click on the Apple icon.
• Select Restart from the drop-down menu.
• Hold down Command-R when you hear the startup chime (or the screen turns black on newer Macs) and keep holding the keys until your computer reboots.

How do I do a clean install of OSX?

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 reinstall my High Sierra from Mojave?

Now, follow the steps to downgrade Mojave to High Sierra.

• Boot your macOS into Recovery Mode and erase your macOS Mojave as mentioned in Method 1.
• Choose, ‘Restore from Time Machine Backup’ from the ‘macOS Utilities’
• Select Time Machine Backup external drive or Time Capsule and choose Connect to Remote Disk.

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)

Does reinstalling Mac delete everything?

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 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 do a clean install of OSX from USB?

3: Create a bootable macOS Mojave installer

• Download new macOS from the App Store.
• When it’s finished, the installer will launch.
• Plug in the USB stick and launch Disk Utilities.
• Click the Erase tab and make sure Mac OS Extended (Journaled) is selected in the format tab.
• Give the USB stick a name then click Erase.

How do I reinstall my High Sierra?

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.

Can I go back to High Sierra from Mojave?

If your Mac came with High Sierra, you’re in luck, because you can use Recovery Mode to roll back — though you’ll need to erase your startup disk first. Likewise, if you have a Time Machine backup of your High Sierra installation just before you installed Mojave.

How do I download High Sierra from Mojave?

Here’s how to get it:

• Click here to download macOS High Sierra from the App Store from MacOS Mojave, then click the “Get” button, this will redirect to the Software Update control panel.
• From the Software Update preference panel, confirm that you want to download macOS High Sierra by choosing “Download”

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 I restore my Mac Air to factory settings?

Startup or Restart using macOS Recovery

1. Turn on or restart your MacBook and hold down the Option+Command (⌘)+ R keys.
2. Use Disk Utility to erase your startup disk AND any other internal hard disk.
3. Select your drive’s name from the left side list and click the 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 do I reinstall El Capitan without losing data?

Question: Q: El capitan reinstall without losing data?

• Reinstall El Capitan Without Erasing the Drive.
• Boot to the Recovery HD: Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears.

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 reinstalling Windows delete everything?

If you choose to erase everything, Windows can even wipe your system drive so no one can recover your personal files later. This is the easiest way to remove your stuff from a PC before getting rid of it. Resetting this PC will delete all your installed programs. Click or tap Get Started under Reset this PC.

How long does macOS High Sierra take to install?

Here’s How Long the macOS High Sierra Update Takes

How do I reinstall Mac OS Internet recovery?

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 install Mac OS on a new SSD?

With the SSD plugged in to your system you’ll need to run Disk Utility to partition the drive with GUID and format it with Mac OS Extended (Journaled) partition. The next step is to download from the Apps Store the OS installer. Run the installer selecting the SSD drive it will install a fresh OS onto your SSD.

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

To avoid having to install OS X twice, do the following.

• 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).
• Quit the Disk Utility application.

How do I do a clean install of OSX Mojave?

How to Clean Install MacOS Mojave

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

How do I make a bootable USB for Mac?

Create USB installer with Boot Camp Assistant

• Insert a USB flash drive to your Mac.
• Open Boot Camp Assistant.
• Check the box for “Create a Windows 7 or later version install disk” and deselect “Install Windows 7 or later version.”
• Click Continue to proceed.

How do I upgrade from Mojave to High Sierra?

How to upgrade to macOS Mojave

1. Check compatibility. You can upgrade to macOS Mojave from OS X Mountain Lion or later on any of the following Mac models.
2. Make a backup. Before installing any upgrade, it’s a good idea to back up your Mac.
3. Get connected.
4. Download macOS Mojave.
5. Allow installation to complete.
6. Stay up to date.

Is macOS High Sierra still available?

Apple revealed macOS 10.13 High Sierra at the WWDC 2017 keynote, which is no surprise, given Apple’s tradition of announcing the latest version of its Mac software at its annual developer event. The final build of macOS High Sierra, 10.13.6 is available right now.

How do I install High Sierra from USB?

Create a bootable macOS installer

• Download macOS High Sierra from the App Store.
• When it’s finished, the installer will launch.
• Plug in the USB stick and launch Disk Utilities.
• Click the Erase tab and make sure Mac OS Extended (Journaled) is selected in the format tab.
• Give the USB stick a name then click Erase.

Can’t be installed on Macintosh HD?

From the “MacOS could not be installed on your computer” screen:

1. Press and hold “option” key and click restart.
2. In the “Startup disk selection” screen, use the arrow keys to select your main hard drive (not the MacOS update)
3. Wait for your Mac to boot normally.
4. Download the latest combo update directly from Apple.

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.

Photo in the article by “Flickr” https://www.flickr.com/photos/rubenerd/3559249651