How To Update Macos High Sierra 10.13.6 To 10.15 !link! -
How to upgrade macOS High Sierra (10.13.6) → macOS Catalina (10.15)
This guide assumes you’re running 10.13.6 and want to move to 10.15 (Catalina). It’s prescriptive and steps are ordered for safety and success.
1. Executive Summary
Upgrading directly from macOS High Sierra (10.13.6) to macOS Catalina (10.15) is possible without intermediate upgrades, provided the target Mac hardware meets Catalina’s system requirements. This report outlines the necessary compatibility checks, data backup procedures, and step-by-step installation instructions. Important note: As of 2023–2024, macOS Catalina no longer receives security updates from Apple. Upgrading further to macOS Big Sur (11), Monterey (12), Ventura (13), or Sonoma (14) is strongly recommended if hardware permits. how to update macos high sierra 10.13.6 to 10.15
Before starting, ensure your Mac hardware supports Catalina. Generally, the following models 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) Step 2: Important Pre-Update Actions Update macOS on Mac - Apple Support How to upgrade macOS High Sierra (10
- Sign into iCloud (same Apple ID).
- Set up Screen Time (optional – you can skip).
- Choose dark or light appearance.
- Migrate data from Time Machine backup (only if this is a clean install; but you’re upgrading, so say “Not now”).
- 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 (all models)
- Mac Pro: Late 2013 or newer
If you just want security updates but like High Sierra, you can keep using it (though no new security patches after late 2020). A better intermediate might be macOS Mojave (10.14) – but that requires a separate guide. Sign into iCloud (same Apple ID)
B. Free Up Storage Space
Catalina needs at least 20GB of free space, but aim for 30–40GB for smooth installation.
- Delete old downloads, empty trash, remove large unused apps.