I have a Canon Canoscan 9000F Mark II scanner and love it. Once I upgraded on my Mac to Monterey the scanner still works but I have to close the scanner window in-between every scan. The Canon website for drivers and downloads does not list Monterey although it lists Mac OS 12. I have used VueScan and it does work but is definitely not as user friendly. To its credit, Vuescan does give you a lot more control and choices in scanning.