When you enter this, the software verifies it against its internal cryptographic seed. If you copy a key from the internet, it will almost certainly fail because the hash generated on your PC does not match the hash the key was originally generated for.
TransMac must be run as an administrator to perform most disk-level operations. Email Filtering: license key for transmac work
You are building a Hackintosh (macOS on non-Apple hardware). You need to restore a macOS DMG to a USB drive from Windows. When you enter this, the software verifies it