How To Update Macos High Sierra 10.13.6 To 10.15 Here

Before you start, note that . Apps like older versions of Microsoft Office or Adobe Photoshop will stop working. macOS - How to Upgrade - Apple (SI)

| Problem | Solution | |--------|----------| | “This copy of the Install macOS Catalina application is damaged” | Set date manually: Open Terminal → date 0101010116 (temporarily) | | Installer freezes at “less than a minute remaining” | Wait 30+ minutes. Restart if stuck (safe to interrupt). | | Mac restarts into High Sierra | The installer failed. Redownload from App Store and try again. | | “You may not install to this volume because it is currently being encrypted” | Go to → turn off encryption first, then install. | how to update macos high sierra 10.13.6 to 10.15

Click the Apple logo (top-left) → “About This Mac.” Under the “Overview” tab, you’ll see the model and year. If your Mac is from 2012 or later (except 2012 Mac Pro cheese grater), you’re likely fine. Before you start, note that

Your Mac must meet specific hardware requirements to run Catalina. Generally, models from are supported: 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 : Restart if stuck (safe to interrupt)

If you open System Preferences > Software Update on High Sierra 10.13.6, you might see "Your Mac is up to date." This is because Apple's CDN (Content Delivery Network) often deprecates upgrade paths for older OS versions.

If you're experiencing persistent issues with the standard upgrade, or if you want to perform a clean install (wiping your drive and starting fresh), a bootable USB installer is a more powerful alternative.

Summary checklist (quick)