How To Update Macos High Sierra 10136 To 1015 (2025)

If using a laptop, plug it into a power source during the update. Step 2: Essential Pre-Update Checklist

Correction on version numbers: macOS High Sierra’s final version is 10.13.6. The next major version was macOS Mojave (10.14), followed by macOS Catalina (10.15). If your goal is to reach a modern, stable OS, we will cover updating to Catalina (10.15). However, be warned: Catalina drops support for 32-bit apps.

Ultimate Guide: How to Update macOS High Sierra 10.13.6 to macOS Catalina 10.15

Upgrading from macOS High Sierra (10.13.6) to macOS Catalina (10.15) is a major jump that brings a refreshed interface, better security, and new features like Sidecar. However, because Catalina is a significant update, this process requires careful preparation to ensure a smooth transition, particularly because Catalina drops support for 32-bit applications. how to update macos high sierra 10136 to 1015

Upgrading from macOS High Sierra (10.13.6) to macOS Catalina (10.15) is a major jump that changes how your system works—most notably, it . 1. Check Hardware Compatibility

Mojave is also no longer receiving security updates (except critical ones for some users). For maximum security, if your Mac supports it, go to macOS Big Sur (11) or Monterey (12) . But from High Sierra, you may need to go to Catalina first.

Total installation time: (depending on drive speed: SSD = ~45 min, HDD = 1.5+ hours). If using a laptop, plug it into a

Release the keys when you see a spinning globe or the Apple logo. Connect to Wi-Fi if prompted. From the macOS Utilities menu, select .

Check the box for and click Back Up Now in the menu bar icon to complete a fresh backup. 3. Clear Storage Space

How to Update macOS High Sierra 10.13.6 to macOS Catalina 10.15 If your goal is to reach a modern,

Updating your Mac from macOS High Sierra (10.13.6) to macOS Catalina (10.15) is a great way to access newer apps, stronger security, and fresh features. This transition moves your Mac from the old 32-bit app ecosystem to a fully 64-bit environment, making your system faster and more secure.

For maximum peace of mind, consider creating a bootable clone of your entire system. This allows you to instantly boot from the external drive and get back to work in High Sierra if the upgrade fails. Popular, user-friendly tools for this are or SuperDuper! (both offer free trials).

Plug your Mac into a reliable power source to prevent it from shutting down mid-installation. Click and enter your administrator password.

Before starting, ensure your Mac is on the official compatibility list :

macOS Catalina only runs 64-bit applications. High Sierra can run both. If you rely on older software (e.g., old Adobe CS6, some games, legacy utilities), they will break.