With the release of macOS 12 ‘Monterey’ and greater, the eDrive tool as well as the Techtool Protogo tool are no longer available in the Tools category of Techtool Pro. The reason why these tools are no longer available is due to an Apple security enforcement which requires that the macOS Installer writes a unique digital signature in order to make the volume a valid bootable system. Prior to macOS 12 ‘Monterey’, copying the operating system of a known bootable system was sufficient. 

To make your own eDrive or Techtool Protogo type of bootable volume, you’ll need to download the macOS Installer application from Apple’s App Store and then run the macOS Installer application and then choose the destination volume you would like to be bootable. Once you have installed an operating system onto the destination volume, boot from the newly created volume to confirm that it boots your Mac and then install Techtool Pro as well as any other utility that you want available when booted from the volume.

Keep in mind that all tests and repairs in Techtool Pro can be performed while booted from your regular startup volume. The only situations that require booting from a different physical device are when running a Surface Scan test on your internal storage or when your normal startup volume fails to boot your Mac from the Recovery partition.

To request that Apple provide the capacity for developers to provide tools like eDrive and Techtool Protogo, please use their macOS feedback page. In your feedback, indicate that you would like third party developers to be able to use the currently installed OS to create bootable backups and diagnostic disks. Thank you.