Enter your admin password. The Mac App Store will download the Install macOS Catalina.app (roughly 8.2 GB) to your /Applications folder.
Once completed, detach the image: hdiutil detach /Volumes/Install\ macOS\ Catalina
When the macOS Utilities window pops up, select if you plan to wipe the drive for a clean install. Otherwise, select Install macOS to upgrade your current data in place.
Before downloading, ensure your Mac is compatible. macOS 10.15.7 generally supports: Early 2015 or newer MacBook Air/Pro: Mid 2012 or newer iMac: Late 2012 or newer Mac Mini: Late 2012 or newer Mac Pro: Late 2013 or newer How to Download macOS Catalina 10.15.7 1. The Official Apple Method (Recommended)
Once finished, Terminal will display "Install media now available". Installing macOS Catalina 10.15.7
Method 2: Convert the Catalina Installer App into a DMG File
If you downloaded Catalina previously on your Apple ID:
By following this guide, you’ll have a verified, virus-free, bootable macOS Catalina 10.15.7 DMG that will serve you for years to come.
Enter your admin password. The Mac App Store will download the Install macOS Catalina.app (roughly 8.2 GB) to your /Applications folder.
Once completed, detach the image: hdiutil detach /Volumes/Install\ macOS\ Catalina
When the macOS Utilities window pops up, select if you plan to wipe the drive for a clean install. Otherwise, select Install macOS to upgrade your current data in place.
Before downloading, ensure your Mac is compatible. macOS 10.15.7 generally supports: Early 2015 or newer MacBook Air/Pro: Mid 2012 or newer iMac: Late 2012 or newer Mac Mini: Late 2012 or newer Mac Pro: Late 2013 or newer How to Download macOS Catalina 10.15.7 1. The Official Apple Method (Recommended)
Once finished, Terminal will display "Install media now available". Installing macOS Catalina 10.15.7
Method 2: Convert the Catalina Installer App into a DMG File
If you downloaded Catalina previously on your Apple ID:
By following this guide, you’ll have a verified, virus-free, bootable macOS Catalina 10.15.7 DMG that will serve you for years to come.
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