How To Update Macos High Sierra 10.13.6 To 10.15 -
There are two primary methods to perform the upgrade.
Updating from High Sierra to Catalina requires a manual download of the installer, but the process is straightforward. Just remember to check for 32-bit apps before you start, as this is the one update that breaks legacy software compatibility.
Upgrading from macOS High Sierra 10.13.6 to macOS Catalina 10.15 is a significant jump. This transition not only modernizes your system but also fundamentally changes how your Mac operates—most notably by ending support for 32-bit applications.
Below is a comprehensive guide to help you prepare for and complete this upgrade safely. 1. Check Hardware Compatibility
Before starting, ensure your Mac model officially supports Catalina. Because Catalina requires a Metal-capable GPU, some older machines that ran High Sierra cannot move forward to 10.15. Compatible Models: MacBook: 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 Mac Pro: Late 2013 or newer Minimum System Requirements: Memory: At least 4GB of RAM.
Storage: Approximately 15GB to 18.5GB of available disk space for the installation. 2. Critical Pre-Upgrade Steps
Do not skip these steps, as the upgrade to Catalina changes your drive format to APFS and removes 32-bit app support.
Backup Your Data: Use the built-in Time Machine tool to create a full system backup to an external drive. This is your safety net if the installation fails.
Check App Compatibility: Catalina will not run 32-bit apps. Use a tool like Go64 or check About This Mac > System Report > Legacy Software to see which apps will stop working.
Check Your Drive Health: Open Disk Utility (found in Applications > Utilities) and run First Aid on your startup disk to ensure there are no errors before the OS rewrite begins. 3. How to Update: Step-by-Step
On High Sierra 10.13.6, you will often not see the Catalina update in the standard "Software Update" window. You must typically find it in the Mac App Store. Upgrade to macOS Catalina. - Apple
To update from macOS High Sierra 10.13.6 to macOS Catalina 10.15, you must first confirm your hardware is compatible. If it is, you can download the installer directly from the Mac App Store. 1. Check Hardware Compatibility
Your Mac must be one of the following models to officially run macOS Catalina: MacBook: 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 2. Prepare for the Update
Back up your data: Use Time Machine to back up your Mac before starting.
Check 32-bit apps: Catalina does not support 32-bit apps. Many older programs (like older versions of Microsoft Office or Adobe CS6) will stop working.
Free up space: You need at least 15–20 GB of available storage.
Check internet: Ensure you have a stable broadband connection for the 8 GB download. 3. Download and Install how to update macos high sierra 10.13.6 to 10.15
Since 10.13.6 is an older version, the update will not appear in "Software Update." You must use the App Store. Open the macOS Catalina page in the Mac App Store. Click Get or Download.
The Software Update window in System Preferences will open; click Download again.
Once the download finishes, the installer will open automatically.
Click Continue and follow the on-screen instructions to complete the installation.
For a step-by-step walkthrough of the entire upgrade process: How to Upgrade to Catalina Mac OS X 10.15 Gemsbok Apple Tips and Tricks YouTube• Dec 4, 2019 Troubleshooting & Tips macOS - How to Upgrade - Apple (SI)
A minimum of 12.5 GB of available storage is required for the installation process. It is recommended to have at least 20 GB free to account for temporary files and post-installation caches.
Since macOS Catalina is no longer the latest version, it may not appear in the “Updates” or “Recommended for you” section. Use one of these methods:
This method erases the hard drive, providing a fresh system free of legacy errors. It requires a USB flash drive (16GB minimum).
Since you are jumping a full version (from 10.13 to 10.15), this is a significant update. Do not skip a backup. Use Time Machine or an external hard drive to back up your files. If anything goes wrong during installation, you can restore your Mac to its previous state.
Upgrading from High Sierra 10.13.6 to Catalina 10.15 is a feasible but increasingly obsolete upgrade path. Users should prioritize checking 32-bit app compatibility, backing up data, and verifying hardware support. For most Macs that support Catalina, upgrading to a newer, still-supported macOS version is strongly advised unless legacy 32-bit software requires Catalina as a final compatible OS.
End of Report
To update from macOS High Sierra 10.13.6 to macOS Catalina 10.15, you will need to download the installer directly from the Mac App Store, as it won't appear in your standard "Software Update" settings wikidot wiki 1. Check Compatibility
Before starting, ensure your Mac model is officially supported. Catalina only runs on Macs with Metal-capable graphics processors: : Early 2015 or newer MacBook Air/Pro : Mid 2012 or newer Mac mini/iMac : Late 2012 or newer : 2017 or newer : Late 2013 or newer Apple Support Note on 32-bit Apps : Catalina is the first macOS to drop all support for 32-bit applications
. Check your critical apps for compatibility using tools like before upgrading. Apple Discussions
how can I update mac os from High Sierra … - Apple Community
How to Upgrade Your Mac from High Sierra (10.13.6) to Catalina (10.15) There are two primary methods to perform the upgrade
Upgrading from macOS High Sierra to macOS Catalina (10.15) is a major leap that brings new features like Sidecar (using your iPad as a second display) and dedicated apps for Music, TV, and Podcasts. However, this version also marks the end of support for 32-bit applications. Follow this guide to ensure a smooth transition. Step 1: Check Hardware Compatibility
Before you begin, verify that your Mac model is officially supported by Catalina. Generally, most Macs from 2012 or newer are compatible. MacBook: 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 Mac Pro: Late 2013 or newer Technical Requirements: OS: OS X 10.9 (Mavericks) or later. Memory: At least 4GB of RAM (8GB recommended).
Storage: At least 12.5GB of available space (up to 18.5GB if upgrading from versions earlier than El Capitan). Step 2: Prepare for the Move (The "32-bit Warning")
Unlike High Sierra, macOS Catalina does not support 32-bit apps. This means older versions of Microsoft Office (like Office 2011), Adobe Creative Suite, and many legacy drivers will stop working.
Action: Use a utility like Go64 to check which of your current apps are 32-bit. You will need to find 64-bit updates or replacements for these before upgrading. Step 3: Back Up Your Data
Never perform a major OS upgrade without a backup. If the installation fails, you could lose your files. Updating and Upgrading macOS High sierra - Apple Community
To update your Mac from macOS High Sierra 10.13.6 macOS Catalina 10.15
, you must first verify your hardware's compatibility and then manually download the installer via the App Store, as it won't appear in the standard "Software Update" window. Step 1: Check Compatibility
Not all Macs that run High Sierra can support Catalina. Ensure your model is on this list: : Early 2015 or newer MacBook Air : Mid 2012 or newer MacBook Pro : Mid 2012 or newer : Late 2012 or newer : Late 2012 or newer : 2017 or newer : Late 2013 or newer Apple Support Important Warning : macOS Catalina is the first version to drop support for 32-bit apps
. Check your critical apps for 64-bit compatibility before proceeding. Apple Support Community Step 2: Prepare Your Mac
how can I update mac os from High Sierra 10.13.6 version to 10.15?
Updating macOS High Sierra 10.13.6 to 10.15: A Step-by-Step Guide
Are you still running macOS High Sierra 10.13.6 on your Mac? If so, you're missing out on the latest features, security patches, and performance enhancements available in macOS 10.15, also known as Catalina. In this article, we'll walk you through the process of updating your Mac from macOS High Sierra 10.13.6 to 10.15.
Preparation is Key
Before you start the update process, make sure your Mac is ready for the transition. Here are some essential steps to take:
Update to macOS 10.15
There are two ways to update to macOS 10.15: using the Software Update mechanism or by downloading the installer from the Mac App Store. We'll cover both methods.
Method 1: Using Software Update
Method 2: Downloading the Installer from the Mac App Store
Installation Process
The installation process may take some time, depending on your Mac's specifications and the speed of your internet connection. Here's what you can expect:
Post-Update Steps
Once the installation is complete, you'll be greeted with the macOS Catalina setup assistant. Here are some essential steps to take:
Conclusion
Updating from macOS High Sierra 10.13.6 to 10.15 is a straightforward process that requires some preparation and patience. By following these steps, you'll be able to enjoy the latest features, security patches, and performance enhancements available in macOS 10.15. If you encounter any issues during the update process, don't hesitate to reach out to Apple Support or visit an Apple Store for assistance.
To update macOS High Sierra 10.13.6 to macOS Catalina 10.15, the process depends primarily on whether your hardware is officially supported. Unlike regular point updates, this is a major system upgrade that requires a full installer from the Mac App Store. 1. Verify Hardware Compatibility
First, confirm your Mac is on the official compatibility list: MacBook: 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 Mac Pro: Late 2013 or newer 2. Pre-Upgrade Checklist
Back Up Your Data: Use Time Machine to create a full system backup before proceeding.
Check Storage Space: You need at least 18.5 GB of available storage to upgrade from High Sierra.
App Compatibility: Catalina does not support 32-bit apps. Use a tool like Go64 to identify older software that will stop working after the update.
Stable Internet: Ensure you have a strong connection, as the installer is approximately 8GB. 3. Step-by-Step Installation
Since you are on High Sierra, the update will not appear in the standard "Software Update" tab in System Preferences. You must download it manually. If unsure, click Apple menu → About This
how can I update mac os from High Sierra 10.13.6 version to 10.15?
Important Note: As of 2026, both macOS High Sierra (10.13) and macOS Catalina (10.15) are considered obsolete and no longer receive security updates from Apple. Furthermore, Catalina is a 64-bit only operating system. Before proceeding, understand that you will permanently lose the ability to run any 32-bit applications.