How To Update Macos High Sierra 10136 To 1015 !!install!! Jun 2026

Use Time Machine to backup your entire system to an external drive. If something goes wrong, you can restore your files.

Time Machine is Apple's built-in, most reliable backup solution.

Type your administrator password if prompted.

If you're having trouble updating directly, you can try using macOS Recovery: how to update macos high sierra 10136 to 1015

You may see a folder on your desktop called "Relocated Items." This contains files that were incompatible with Catalina and were moved from your old system.

Just let me know your and if you have any essential old apps ! Updating and Upgrading macOS High sierra - Apple Community

Before downloading any files, it's critical to verify that your Mac is compatible with macOS Catalina and that its current state is prepared for the upgrade. Use Time Machine to backup your entire system

However, if you have a 2014+ Mac with an SSD, – it is faster, more secure, and supports modern browsers longer.

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.

Once the download finishes, the installation window titled will automatically launch on your desktop. Type your administrator password if prompted

Select your main drive (usually "Macintosh HD") as the destination. Enter your when prompted.

If an update is available, you'll see it listed here. Click Update Now or Upgrade Now to begin the process. Depending on your internet connection, this might take a while.

How to Update macOS High Sierra 10.13.6 to macOS Catalina 10.15

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