Overview

Performed a full clean installation of macOS on a 2020 MacBook Pro to eliminate previous data, restore system performance, and start with a fresh configuration.

The goal was to have a clean, up-to-date macOS environment that could be used either as a daily driver or dedicated productivity device. After installation, I reconnected the device to the Apple ecosystem, ensuring full sync across all personal Apple hardware.

System Specs

• Device: 2020 MacBook Pro
• Processor: Intel Core i7
• Memory: 32GB RAM
• Storage: 1TB SSD
• macOS Version Reinstalled: Latest version via Recovery, updated to macOS Sequoia 15.4

Steps Performed

1. Pre-Installation Prep

• Signed out of Apple ID and disabled Find My Mac to avoid iCloud lock or restore issues.
• Verified a stable Wi-Fi connection for use with Internet Recovery.
• Backed up any final essential files externally (even though the goal was a clean slate).

2. Entered macOS Recovery & Wiped the Drive

• Booted into macOS Recovery Mode using Command + R.
• Opened Disk Utility and formatted the internal SSD as:
  • APFS (file system)
  • GUID Partition Map (partition scheme)
• Ensured the drive was fully clean and properly prepared for a fresh install.

3. Reinstalled macOS

• Selected Reinstall macOS from the Recovery Utilities menu.
• Used Internet Recovery to download and install the latest supported version.
• Allowed install to complete and boot into the Setup Assistant.

4. Performed Initial System Setup

• Created a local user account and set a strong password.
• Skipped Apple ID sign-in initially to prevent iCloud sync until the OS was fully updated.
• Applied basic settings:
  • Enabled Dark Mode
  • Configured trackpad (tap-to-click, natural scrolling)
  • Selected language and keyboard input preferences

5. Updated to macOS Sequoia 15.4

• Opened System Settings > Software Update.
• Downloaded and installed macOS Sequoia 15.4.
• Rebooted and confirmed the system was stable and fully updated.

6. Reconnected to Apple Ecosystem

• Signed back into Apple ID and re-enabled Find My Mac.
• Verified seamless sync with:
  • iPhone 13
  • iPhone 15
  • iPad
  • Apple Watch
• Confirmed the following services were fully functional:
  • iMessage and FaceTime
  • iCloud Drive
  • Continuity features like Handoff, Universal Clipboard, and AirDrop
  • Find My location services

Result

The MacBook Pro was returned to a clean, fully updated state with macOS Sequoia 15.4.