How To Update Macos High Sierra 10.13.6 To 10.15 [exclusive] Jun 2026

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

You have the installer in your Applications folder. Now follow these steps carefully. how to update macos high sierra 10.13.6 to 10.15

Once the installation is complete, you'll be greeted with the setup assistant. Here are some essential steps to take: Delete the installer and redownload using the official