Use a USB 2.0 port if available. Some older scanners struggle with the power management settings of USB 3.0/3.1 ports.
Before giving up, ensure you have:
Apple dropped support for nearly all UMAX scanners after macOS Catalina (10.15) due to the removal of 32-bit libraries. There is no for modern Macs. Your only options:
: Sometimes, baseline UMAX drivers are archived in the Microsoft Update Catalog , though they may only support primary hardware functions.