How to Download macOS 10.15 Catalina and Perform a Clean Installation
Whatever the reason, downloading a macOS 10.15 Catalina DMG file is the first step towards achieving a clean installation. In this story, we'll guide you through the process of downloading the DMG file and performing a clean installation.
Before you download, ensure your hardware supports macOS Catalina. Generally, if your Mac was released in mid-2012 or later, it should be compatible. MacBook: Early 2015 or newer MacBook Air / Pro: Mid 2012 or newer Mac Mini: Late 2012 or newer iMac: Late 2012 or newer
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- Back up your important files: Before performing a clean installation, make sure to back up your important files and data to an external hard drive or cloud storage service.
- Use a USB drive with enough space: Make sure the USB drive you use to create a bootable installer has enough free space (at least 8GB).
- Be patient during the installation process: The installation process may take a few minutes to complete, depending on the speed of your Mac and the USB drive.
Via App Store: Visit the macOS Catalina page in the Mac App Store and click Get. This will open System Preferences/Settings to download the installer.
Common Errors When Downloading Catalina DMG & Fixes
Error 1: "The installer information is damaged"
Fix: Run date 0101010116 in terminal before launching the installer (temporal certificate bypass).