How To Update Macos High Sierra 10.13.6 To 10.15 Site
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. how can I update mac os from High Sierra 10.13.6 version to 10.15?
Technical Procedure: Upgrading from macOS High Sierra 10.13.6 to macOS Catalina 10.15 Date: October 26, 2023 Subject: System Upgrade Path and Migration Strategy Target Audience: Mac Users, System Administrators, and IT Support Staff 1. Abstract This paper outlines the systematic procedure for upgrading an Apple Macintosh computer running macOS High Sierra (version 10.13.6) to macOS Catalina (version 10.15). As the jump encompasses two major operating system versions, specific attention must be paid to hardware compatibility, data backup protocols, and the transition from 32-bit to 64-bit application architecture. This document serves as a step-by-step roadmap to ensure data integrity and a successful installation. 2. Introduction macOS Catalina (10.15) represents a significant shift in the macOS ecosystem, introducing features such as Sidecar and Voice Control, while simultaneously discontinuing support for 32-bit applications. Users currently on macOS High Sierra (10.13.6) are in a prime position to upgrade, as the system requirements overlap significantly. However, because the Software Update mechanism in High Sierra does not automatically prompt for an upgrade to an OS older than the current release (Sonoma/Ventura), users must utilize specific methods to retrieve and install Catalina. 3. Pre-Installation Assessment 3.1 Hardware Compatibility Before initiating the upgrade, the user must verify that their hardware supports macOS Catalina. The following models are compatible with 10.15 but are generally compatible with High Sierra:
MacBook Pro (2012 or newer) MacBook Air (2012 or newer) MacBook (Early 2015 or newer) iMac (2012 or newer) iMac Pro (2017 or newer) Mac Pro (Late 2013 or newer) Mac mini (2012 or newer)
3.2 The 32-Bit Application Warning macOS Catalina is the first version of macOS that exclusively supports 64-bit applications. High Sierra (10.13.6) was the last version to support 32-bit apps without major warnings. how to update macos high sierra 10.13.6 to 10.15
Action Item: Users should navigate to System Report > Applications and check the "64-Bit (Intel)" column. Any application labeled "No" will cease to function after the upgrade. Users must find replacements or updates for these apps before proceeding.
3.3 Storage Requirements 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. 4. Data Preservation and Backup Major operating system upgrades carry an inherent risk of data loss. A robust backup strategy is mandatory. 4.1 Time Machine Backup
Connect an external hard drive with sufficient capacity. Navigate to System Preferences > Time Machine . Select "Back Up Automatically" or perform a manual backup. Verify the completion of the backup before proceeding. To update macOS High Sierra 10
5. Acquisition of macOS Catalina Unlike minor updates, the installer for macOS Catalina is not always visible in the "Updates" tab of the Mac App Store on High Sierra machines. The most reliable method is using Apple’s official hidden support pages. 5.1 The Official Link Method
Open the Safari browser. Search for or navigate to the Apple Support article titled "How to get old versions of macOS." Locate the link for macOS Catalina . Note: Do not use third-party mirrors; use the Mac App Store link hosted on Apple’s servers. Clicking the link will open the Mac App Store to the Catalina download page. Click "Get."
5.2 Downloading the Installer The installer is approximately 8 GB. Once downloaded, the "Install macOS Catalina" app will launch automatically. Immediately quit the installer if you intend to make a bootable USB installer (Method B in Section 6). If you wish to upgrade directly, proceed with the on-screen prompts. 6. Installation Methods There are two primary methods to perform the upgrade. 6.1 Method A: Direct Upgrade (Recommended for most users) This method retains user data, accounts, and applications. Verify Hardware Compatibility First, confirm your Mac is
Ensure the Mac is connected to a power source. Locate the "Install macOS Catalina" application in the Applications folder and launch it. Click Continue and agree to the software license agreement. Select the target disk (usually "Macintosh HD"). Click Install . The computer will restart. The installation process involves copying files, verifying the installation, and a final reboot. This process may take 30 to 60 minutes depending on drive speed.
6.2 Method B: Clean Install (Advanced) This method erases the hard drive, providing a fresh system free of legacy errors. It requires a USB flash drive (16GB minimum).