How do I reinstall Mac OS from Windows?

How do I wipe my Mac and start fresh?

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 revert back from Windows to Mac?

Restart your Mac, and hold down the Option key until icons for each operating system appear onscreen. Highlight Windows or Macintosh HD, and click the arrow to launch the operating system of choice for this session.

How do I do a clean install of OSX?

Step 4: Wipe your Mac

1. Connect your boot drive.
2. Start up – or restart – your Mac while holding down the Option key (also known as Alt). …
3. Choose to install your chosen version of macOS from the external drive.
4. Select Disk Utility.
5. Select your Mac’s start up disc, probably called Macintosh HD or Home.
6. Click on Erase.

2 февр. 2021 г.

What do I do if I can’t reinstall OSX?

First, completely shut down your Mac via the Apple Toolbar. Then, hold down Command, Option, P, and R buttons on your keyboard as you restart your Mac. Continue to keep these buttons held until you hear the Mac startup chime twice. After the second chime, let go of the buttons and let your Mac restart as normal.

Where is recovery on Mac?

How to start Mac in Recovery Mode

1. Click on Apple logo at the top left of the screen.
2. Select Restart.
3. Immediately hold down the Command and R keys until you see an Apple logo or spinning globe. …
4. Eventually your Mac will show the Recovery Mode Utilities window with the following options:

2 февр. 2021 г.

How do I get Windows 10 off my Mac?

Remove Windows from your Mac using Boot Camp

1. Start up your Mac in macOS.
2. Back up all important data stored on your Windows partition before you remove Windows. …
3. Quit all open apps and log out any other users.
4. Open Boot Camp Assistant , then click Continue.
5. If the Select Tasks step appears, select “Remove Windows 10 or later version,” then click Continue.

How can I change my Mac to Windows 10?

There are two easy ways to install Windows on a Mac. You can use a virtualization program, which runs Windows 10 like an app right on top of OS X, or you can use Apple’s built-in Boot Camp program to partition your hard drive to dual-boot Windows 10 right next to OS X.

Can I remove macOS and install Windows?

If you want to remove macOS completely, then there’s no need to use Boot Camp at all (with that big exception of the support software, which you already have!) You can then boot to the Windows installer, choose to erase the drive completely, then install Windows on the full space – if that’s what you really want.

How do I reinstall OSX without USB?

Tutorial

1. Restart your Mac, or power it on, while holding down the Command + R key combination.
2. Release the Command + R key combination once you see the Apple logo on display. …
3. Once you see a window like the one below, click on Disk Utility and Erase your main Mac HDD (or SSD).

31 окт. 2016 г.

How do I reinstall OSX without losing files?

How to Reinstall Mac OS?

1. Step 1: Backup Files on Mac. If you don’t want to suffer from an unexpected loss of your important files during the reinstallation, then you should take a backup of your data beforehand. …
2. Step 2: Boot Mac in the Recovery Mode. …
3. Step 3: Erase the Mac Hard Disk. …
4. Step 4: Reinstall Mac OS X without Losing Data.

How do I reinstall OSX without disc?

Reinstall Your Mac’s OS Without an Installation Disc

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.

21 апр. 2020 г.

How do I reinstall OSX without Internet?

Installing a fresh copy of macOS via Recovery Mode

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

How do I reinstall OSX from USB?

Booting Your Mac From a USB Drive

Simply plug your created USB drive into an open USB port on your Mac. Power on the system, or restart it if it’s already on. Immediately press and hold the Option (Alt) key on your keyboard when it starts booting. You should now see an option to select your USB drive as a startup disk.

Can’t reinstall macOS because disk is locked?

Boot to the Recovery Volume (command – R on a restart or hold down the option/alt key during a restart and select Recovery Volume). Run Disk Utility Verify/Repair Disk and Repair Permissions until you get no errors. Then re-install the OS.