Preliminary note
The IRISCard and IRIScan Anywhere, and IRIScan Book scanners are designed to be used on their own, disconnected from any computer. The documents you scan are stored in the scanner’s internal memory (or optional SD card / USB flash drive).
From there they can be loaded into Readiris.
So, note that these scanners are not Twain-driver scanners that can be used from within any application to scan documents. Instead, think of them as USB storage devices that are able to scan independently.
To load scanned documents into Readiris:
Connect your scanner to your computer with the provided USB cable and power it on.
OR insert the SD card or USB flash drive you used in the scanner into your Mac.
Readiris detects if card images were scanned to the storage medium. Click Yes to select them. Readiris then opens the right folder.