How To Update Macos High Sierra 10.13.6 To 10.15 【Newest】

To update your Mac from macOS High Sierra 10.13.6 to macOS Catalina 10.15, you must use the Mac App Store rather than the standard "Software Update" menu, as 10.15 is considered a major version upgrade rather than a minor patch. Step 1: Check Compatibility

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

To update your Mac from macOS High Sierra 10.13.6 macOS Catalina 10.15

, you must first verify your hardware's compatibility and then manually download the installer via the App Store, as it won't appear in the standard "Software Update" window. Step 1: Check Compatibility how to update macos high sierra 10.13.6 to 10.15

Not all Macs that run High Sierra can support Catalina. Ensure your model is on this list: : Early 2015 or newer MacBook Air : Mid 2012 or newer MacBook Pro : Mid 2012 or newer : Late 2012 or newer : Late 2012 or newer : 2017 or newer : Late 2013 or newer Apple Support Important Warning : macOS Catalina is the first version to drop support for 32-bit apps

. Check your critical apps for 64-bit compatibility before proceeding. Apple Support Community Step 2: Prepare Your Mac

how can I update mac os from High Sierra 10.13.6 version to 10.15? To update your Mac from macOS High Sierra 10

B. Free Up Storage Space

Catalina needs at least 20GB of free space, but aim for 30–40GB for smooth installation.

• Empty the Trash.
• Use Storage Management (→ About This Mac → Storage → Manage). Remove iOS files, large old downloads, and Language files.
• Run sudo tmutil listlocalsnapshots / in Terminal to delete Time Machine local snapshots if space is critical.

Step 5: Let It Restart… a Lot

Your Mac will restart, show a black screen with an Apple logo and progress bar, then restart again. This is normal.

• First stage: Preparing installation (20–30 min)
• Second stage: Installing on disk (30–45 min)
• Third stage: Configuring system (10–20 min)

Do not close the lid, unplug power, or force shut down. If on a laptop, keep it plugged into AC power. Empty the Trash

Upgrade macOS High Sierra (10.13.6) → macOS Catalina (10.15): Step-by-step guide

Important assumptions made: you have a Mac that supports macOS Catalina (2012–2019 Macs generally; see Apple compatibility list below). This guide prescribes a safe, actionable upgrade path and fallback steps.

Problem: “This copy of the Install macOS Catalina.app is damaged”

Solution: Delete the installer and redownload using the official App Store link. Or in Terminal, run sudo spctl --master-disable before launching the installer.

8. Alternatives & Recommendations

• If your Mac cannot run Catalina: Stay on High Sierra (security updates ended Nov 2020) or use a patching utility (e.g., DosDude1’s Catalina Patcher) for unsupported Macs (advanced users only).
• If your Mac can run Big Sur or newer: Skip Catalina and go directly to a still-supported version (Monterey or Ventura) for security reasons.

Step 3: Obtain the macOS Catalina Installer

Apple removed Catalina’s direct download page from the App Store front page, but the installer is still available.

Method 1: Via the App Store link

• Use this direct link: macOS Catalina on App Store
• Click View in Mac App Store → Get → Download.
• The 8GB+ installer will download to your Applications folder.

Method 2: If the App Store fails

• Older Macs sometimes get stuck on “Requesting.” In that case, use a web browser to download from Apple’s support site or use gibMacOS tool (advanced). But first, try Method 1 on a good Wi-Fi connection.