How To Update Macos High Sierra 10136 To 1015

: Use the built-in Time Machine utility to back up your files to an external drive.

The macOS Catalina installer requires a significant amount of free storage space to download, extract, and install files safely.

This often happens if the download was corrupted. Delete the installer, restart your Mac, and download it again.

Launch the browser (avoid third-party browsers for this step to ensure correct redirection). Go to the official Apple Support page for legacy software. Click the direct link for macOS Catalina 10.15 . how to update macos high sierra 10136 to 1015

Updating from High Sierra to Catalina is a straightforward process via the Mac App Store, provided you have verified hardware compatibility and backed up your data. However, the loss of 32-bit app support makes this a "point of no return" for users reliant on older software.

Note: If your Mac is older than these models, you cannot update to Catalina and must stay on High Sierra or install a lightweight Linux distribution.

The download file is roughly 8 GB. Once completed, the installer will automatically launch on your screen, titled Install macOS Catalina . Click and follow the onscreen prompts. : Use the built-in Time Machine utility to

Ensure you have at least 15GB to 20GB of free storage space on your primary drive.

Updating from macOS High Sierra 10.13.6 to Catalina 10.15 is less about getting new features (like Screen Time or Reminders upgrades) and more about maintaining security and app support. While Catalina receives security updates (until late 2022, now obsolete), High Sierra is unsupported. However, the loss of 32-bit apps is a major trade-off. If your essential software is 64-bit and your Mac is from 2012 or later, the update is logical. If you rely on legacy software, consider staying on High Sierra or jumping to a middle ground like , which still supports 32-bit apps. Always remember: a complete backup before any OS upgrade is your safety net. Proceed with knowledge, not just enthusiasm.

Your Mac will restart automatically. Do not turn off the Mac during this process, which may take up to an hour or more. Phase 4: Post-Installation & Finalization Delete the installer, restart your Mac, and download

Once you're booted into macOS Catalina for the first time, there are a few final tasks:

Skipping an entire generation of macOS means substantial changes are made to your file system. Do not skip these preparation steps, or you risk losing your data. Check Storage Space

Here’s a step-by-step guide to update from (the final version of 10.13) to macOS Catalina 10.15 .