How To Update Macos: High Sierra 10.13.6 To 10.15

To update macOS High Sierra 10.13.6 to macOS Catalina 10.15, you must first verify that your hardware is compatible and then download the installer from the Mac App Store. Because 10.13.6 does not always show Catalina in the standard "Software Update" menu, manual download is often required. 1. Verify System Compatibility

  1. Create a bootable USB installer (requires another guide).
  2. Boot from USB (hold Option key at startup).
  3. Use Disk Utility to erase your drive (APFS format).
  4. Install Catalina fresh.
  5. Migrate your data back from Time Machine later.
  1. Set up your Mac: Follow the on-screen instructions to set up your Mac, including creating a new user account or transferring your existing account.
  2. Update your apps: Check for updates to your installed apps, as some may not be compatible with macOS 10.15.
  3. Configure your settings: Review your system settings, such as Security & Privacy, Network, and Notifications, to ensure they're configured to your liking.

Reconnect peripherals one by one, checking for driver updates. how to update macos high sierra 10.13.6 to 10.15

Click Continue and follow the on-screen instructions to complete the installation. To update macOS High Sierra 10

Upgrade macOS High Sierra (10.13.6) → macOS Catalina (10.15): Step-by-step guide

Important assumptions made: you have a Mac that supports macOS Catalina (2012–2019 Macs generally; see Apple compatibility list below). This guide prescribes a safe, actionable upgrade path and fallback steps. Apple menu > App Store > Updates: install

Conclusion

Upgrading to macOS 10.15