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# macOS Big Sur

{% embed url="<https://www.youtube.com/watch?v=kZdfOkVib-c>" fullWidth="true" %}
How to Erase / Factory reset Mac / macOS Big Sur reinstall
{% endembed %}

### Prerequisites

* Back up all your files and data before starting
* Ensure you have a stable internet connection
* Know your Apple ID and password
* Know your current Mac password
* Set aside 3-5 hours for the complete process

### Step 1: Enter Recovery Mode

1. Restart your Mac (or turn it on if it's off)
2. Immediately press and hold Command (⌘) + R
3. Keep holding until you see the Recovery screen
4. Select your Mac username
5. Enter your Mac password
6. Verify your internet connection (Wi-Fi or Ethernet)

### Step 2: Erase Your Disk

1. Open **Disk Utility** from the Recovery screen
2. Select your hard drive (usually labeled as "*Macintosh HD*")
3. Click "**Erase**"
4. Keep the default settings
5. Confirm the erase operation
6. Wait for the process to complete (indicated by a checkmark)
7. Click "**Done**"
8. Exit Disk Utility

### Step 3: Reinstall macOS

1. Select "**Reinstall macOS**" from the Recovery screen
2. Click "**Continue**"
3. Read and agree to the terms and conditions
4. Select your hard drive as the installation destination
5. Click "**Continue**"
6. Wait for the installation process (up to 5 hours depending on internet speed)

### Step 4: Initial Setup

1. Select your country/region
2. Configure accessibility settings if needed
3. Connect to Wi-Fi and enter password
4. Skip Time Machine backup (select "*Not Now*")
5. Sign in with your Apple ID
6. Enter your Apple ID password
7. Verify your identity using your phone or iPad
8. Create a new Mac password
9. Configure additional settings:
   * Siri preferences
   * Analytics and dictation settings
   * Choose appearance (Light or Dark mode)

### Important Notes

> ⚠️ **Warning**: All data will be erased during this process. Make sure you have a backup before proceeding.

* Installation time varies based on your internet speed and computer specifications
* Make sure you don't lose power during the installation
* Your Mac will restart several times during the process

### Troubleshooting

#### Common Issues

* **Can't Enter Recovery Mode?**
  * Try restarting and attempting again
  * Make sure you're pressing the keys immediately after the startup sound
* **Installation Fails?**
  * Verify your internet connection is stable
  * Ensure you have enough disk space
  * Check that you're using the correct Apple ID credentials

#### Keyboard Shortcuts

Command (⌘) + R = Enter Recovery Mode

### After Installation

1. Install your essential applications
2. Restore your backed-up data
3. Configure your system preferences
4. Update macOS to the latest version if available

***

*Note: This guide is specific to macOS Big Sur. Some steps might vary slightly for different macOS versions.*