Fujitsu/Ricoh never released macOS drivers for the fi-7000 series. Community solutions like VueScan (by Hamrick Software) offer a third-party driver for macOS, but full feature support (e.g., ultrasonic double-feed detection) is not guaranteed.
To ensure a smooth setup, keep these verified steps in mind: Manual Downloads: fi-7140 / fi-7240 | Global - PFU - Ricoh