@Kevin_Z Thanks for your Regards! I want offer you my all possible cooperation willingly. Sadly, My iMac has been a change. It has been upgraded "macOS Big Sur" yesterday. And your "USB Printer...

@Kevin_Z Thanks for your reply !!! My router is 'Archer C7 v2' ( AC1750 ). "My mac stop on rebooting' means cannot finish the reboot. So I had to turn it off by force and reboot in safe mode. Then...

@Kevin_Z When New version 'TP-LINK USB Printer Controller.dmg' installed and restart, My Mac stop on ReBooting. I Tried it several times... My macOS Catalina version is 10.15.7. Help Me !!!