How To Update Macos High Sierra 10.13.6 To 10.15 __top__ Jun 2026

After your Mac boots into macOS Catalina, there are a few final steps to take.

You can verify your model by clicking the . 2. Prepare Your Mac (Crucial Steps)

By following these steps, you will successfully transition from High Sierra to the more secure and feature-rich Catalina, keeping your older Mac running securely.

Choose between Light Mode, Dark Mode, or Auto Mode (which shifts based on the time of day). how to update macos high sierra 10.13.6 to 10.15

It is completely normal for your Mac to feel sluggish or warm for a few hours or even a day or two after a major upgrade. The system is performing many background tasks, such as re-indexing your files for , re-analyzing your Photos library, and performing various system maintenance routines. The best course of action is patience. Keep your Mac plugged in, connected to power, and simply use it as normal. Performance will stabilize within a few days.

Wait for the list to load, then click the column header to sort the apps.

There are two ways to update your Mac to macOS 10.15: After your Mac boots into macOS Catalina, there

Step 6: Post-Installation Setup

The following Mac models natively support macOS Catalina 10.15 : : Early 2015 or newer MacBook Air : Mid 2012 or newer MacBook Pro : Mid 2012 or newer Mac Mini : Late 2012 or newer iMac : Late 2012 or newer iMac Pro : 2017 or newer Mac Pro : Late 2013 or newer

Now that you've prepared your Mac and chosen the right update path, follow these steps: Prepare Your Mac (Crucial Steps) By following these

Upgrading from macOS High Sierra to Catalina is a significant leap forward. While the process requires careful planning—especially regarding the death of 32-bit apps and the need for a solid backup—the reward is a Mac that is more secure, capable, and in sync with the modern Apple ecosystem. By following this guide, checking your compatibility, preparing your system, and choosing the installation method that's right for you, you can confidently make the upgrade. macOS Catalina is more than just an update; it's the foundation for a better, more versatile computing experience. Once you're up and running, be sure to explore System Preferences to discover all the new features, and remember, if you ever feel your Mac slowing down, the post-installation performance tips above should help keep it running smoothly.

Use this direct link to the installer package (requires a fast internet connection): https://itunes.apple.com/us/app/macos-catalina/id1466841314?mt=12

Once the update is complete, your Mac will restart and begin the installation process:

If you have a 2013+ Mac with an SSD and no 32-bit apps, download the installer from Apple’s legacy URL, backup, and run the installer. If not, stay on High Sierra.

After the final reboot, you’ll see the Catalina setup assistant.