# OS X Yosemite

{% embed url="<https://www.youtube.com/watch?v=aTMGhG1w0w0>" fullWidth="true" %}
Mac - Factory reset / Fresh install on OS X Yosemite
{% endembed %}

### Prerequisites

* Stable internet connection
* Apple ID and password
* Enough time for download and installation
* Power adapter connected

### Step 1: Enter Recovery Mode

1. Restart your Mac
2. Press and hold the `Option` key
3. Hold for about 20 seconds
4. Wait for boot selection screen
5. Select "**Recovery**" partition
6. Wait for Recovery Mode to load

### Step 2: Erase Your Drive

1. Select "**Disk Utility**"
2. Click "**Continue**"
3. From sidebar, select your main hard drive
4. Click "**Erase**"
5. Confirm settings
6. Click "**Erase**" again
7. Wait for process to complete
8. Close Disk Utility

### Step 3: Install OS X Yosemite

1. Select "**Reinstall OS X**"
2. Click "**Continue**"
3. Wait for system verification with Apple servers
4. Read and agree to terms (twice)
5. Select your erased drive
6. Click "**Install**"
7. Enter Apple ID credentials:
   * Apple ID
   * Password
8. Click "**Sign In**"

### Step 4: Installation Process

> ⚠️ **Warning**: Do not turn off your Mac or disconnect from internet during installation

1. Wait for download and installation
2. System will restart automatically
3. Installation continues after restart

### Step 5: Initial Setup

1. Select country and language
2. Migration Assistant:
   * Skip if no backup
   * Restore from backup if available
3. Sign in with Apple ID
4. Accept terms and conditions
5. Create user account:
   * Enter personal information
   * Set up password

### Important Notes

> ⚠️ **Warning**: This process erases all data. Back up important files before starting.

#### Installation Time Factors

* Internet speed affects download time
* Installation can take several hours
* Keep Mac plugged in throughout process

### Troubleshooting

* If Recovery Mode doesn't appear:
  * Try holding Option key earlier
  * Ensure key is held long enough (20 seconds)
* If verification fails:
  * Check internet connection
  * Verify Apple ID is active

### After Installation

1. Verify system operation
2. Install necessary applications
3. Configure system preferences
4. Check for updates

***

*Note: This guide is specific to OS X Yosemite. Steps may vary for other versions.*


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