Why can't I succeed in making a bootable usb drive with Ventura. It always fails.

Hello!

You need to enable Full Disk Access for the Terminal.

If you're using macOS Monterey or earlier, go to System Preferences > Security & Privacy > Privacy, scroll down to "Full Disk Access", and grant it to the Terminal.

If you're using macOS Ventura, go to System Settings > Privacy & Security > Full Disk Access, and grant it to the Terminal.

Then, start the process again.

Jack

If this error occurred at the end of the process involving the command line, then it may indicate a bad USB stick. Try using another USB stick, especially a different brand. The quality of USB sticks is extremely poor.

The link below will provide the correct directions to make a Bootable Installer of Ventura macOS 13 using the Terminal Commands

Create a bootable installer for macOS

The above is predicated on the Full Version of Ventura ( about 12.26 GB size ) in located in the applications folder of this computer

Further and very important ➡️

The Bootable Installer can Only be performed on an Apple Computer 

This will have to be performed from a Qualifying Computer to run the version of macOS to be made on the Bootable Installer. Example : Bootable Installer of Ventura would have to be done on a computer that Qualifies to run Ventura .

Notation: If the computer being used to perform this action is Too New or Too Old to qualify to run the version of macOS - this computer can not be used.

Alternative is, to gain access to a Qualifying Apple Computer from a family member, friend or associate.