Thanks again, but (unless I misunderstood what you meant) it only made things worse. Unplugging an re-plugging the MFC machine's USB cable had only the effect of (1) making *all* the settings instructions disappear on the Image Capture window--it was all just blank white--and (2) bringing up an error message (which won't respond to its own "close" button--it won't go away unless I restart the computer, and won't let me RE-open Image Capture after closing the current window for Image Capture). That message says to stop and re-start the MFC machine itself, which also did not help at all.
Did I get this right? The scanner has always worked fine (with or without OCR) with my old PC, and the printer has always worked fine with my Mac. Are there perhaps multi-function machines that work better with Macs? (I just have no space for a separate printer, scanner and fax.)
Because the scanner puzzlingly did work once (i.e., the Scan button finally appeared) with the Mac, I keep thinking there must be some little thing....
FC