How To Update Macos High Sierra 10136 To 1015 Jun 2026
How to Update macOS High Sierra 10.13.6 to macOS Catalina 10.15
Once you're booted into macOS Catalina for the first time, there are a few final tasks:
Upgrading from macOS High Sierra 10.13.6 to macOS Catalina 10.15 is a significant jump that transitions your system to a 64-bit-only environment. Before you begin, you must verify your hardware compatibility and prepare your data, as this update reformats your drive and drops support for older 32-bit applications. Phase 1: Compatibility & Preparation Updating and Upgrading macOS High sierra - Apple Community
macOS Catalina dropped support for older 32-bit graphics architectures. This means not every Mac capable of running High Sierra can upgrade to Catalina. how to update macos high sierra 10136 to 1015
Your Mac will restart to begin the installation process. A progress bar and an estimated time remaining will appear on a black screen. Keep your Mac plugged into power and do not close the lid or turn it off during this time. Troubleshooting Common Installation Issues
Never attempt a major operating system upgrade without a current backup. If the installation is interrupted or a drive error occurs, you risk losing your data. Connect an external hard drive to your Mac. Open from your System Preferences. Click Select Backup Disk and choose your external drive.
Updating from macOS High Sierra (10.13.6) to macOS Catalina (10.15) is a significant jump that introduces new features like dedicated Music, TV, and Podcasts apps, but also marks the end of support for . 1. Check Hardware Compatibility How to Update macOS High Sierra 10
Upgrading from is a significant jump that brings your Mac into the era of 64-bit-only computing and refreshed Apple apps like Music and Podcasts. Because this is a "major upgrade" rather than a simple "update," the process requires moving through the Mac App Store . Step 1: Check System Compatibility
Catalina officially supports the following Mac models:
Because you are running High Sierra, you may not see Catalina in "Software Update" within System Preferences. You must use the App Store: macOS - How to Upgrade - Apple (SI) This means not every Mac capable of running
How to Update macOS High Sierra 10.13.6 to macOS Catalina 10.15
: Go to the Apple menu () > About This Mac > System Report > Software > Legacy Software to see which apps will no longer work.
Before starting, ensure your Mac model officially supports macOS Catalina. Generally, if your Mac can run macOS Mojave, it can also run Catalina. The official compatibility list includes: