Okay, I have now updated another Mac to 10.11.1 and installed SANE 3.5 with no change...I can still see the scanner, however I cannot scan. -- View this message in context: http://sane.10972.n7.nabble.com/SANE-3-3-OS-X-10-8-error-during-device-I-O-tp20472p20473.html Sent from the SANE - Dev mailing list archive at Nabble.com.