If you want to move forward with the installation, let me know:
(hidden inside the app) to flash the image: sudo /Applications/Install\ macOS\ Catalina.app/Contents/Resources/createinstallmedia --volume /Volumes/Catalina --nointeraction
If you verified the DMG but need to run Catalina in VMware or VirtualBox, you must convert the format. macos catalina dmg direct download verified
Compare the output to verified community checksums for the macOS Catalina 10.15.7 final build to ensure the file hasn't been modified. Creating a Bootable macOS Catalina USB from the DMG
When the Terminal shows "Install media now available," your verified bootable macOS Catalina USB drive is ready for use. You can now restart your Mac, hold down the key during startup, and select the USB drive to begin your clean installation. If you want to move forward with the
Before running any installer, verify its digital fingerprint (hash) to ensure it has not been modified. Open . Type shasum -a 256 (include the space).
I can provide the exact command strings or recovery steps tailored to your setup. Share public link You can now restart your Mac, hold down
Open and format the drive as Mac OS Extended (Journaled) with a GUID Partition Map . Name the drive CatalinaUSB .