Download !!install!!+macos+1015+catalina+dmg+file+for+clean+installation+hot Page

Use Apple’s built-in creation tool to write the installer files into the image:

Are you currently trying to make the installer? Are you seeing a specific error message ?

hdiutil create -o /tmp/Catalina -size 8500m -volname Catalina -layout SPUD -fs HFS+J Use code with caution. Mount the newly created blank disk image: Use Apple’s built-in creation tool to write the

FormatUSB (You can use any name, but matching this makes the next command easy). Format: Mac OS Extended (Journaled) Scheme: GUID Partition Map Click Erase and wait for the process to finish. Open Terminal and execute the official block-copy command:

A DMG alone isn't enough for a true clean installation. You need a . Mount the newly created blank disk image: FormatUSB

Copy and paste the following command string directly into the window:

sudo /Applications/Install\ macOS\ Catalina.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume You need a

With your bootable USB drive successfully flashed, you are ready to perform the clean install. Step 1: Boot into the Installer Drive Shut down your target Mac completely. Insert your bootable macOS Catalina USB drive.