Did Catalina Kill Your SnapScan S1500M?
Fujitsu has announced they won't supply a Catalina compatible driver for the SnapScan S1500M. One of the few workarounds available is VueScan which supports the S1500M and many other older scanners. One caution though, the VueScan website can lead you to buy the Standard version of VueScan only to find the more expensive Professional version is required to get rid of the watermark on scans made with the Standard version. The Standard version will not work with any "Automatic Document Feeder" such as the S1500M.