I.R.I.S. Readiris 14 for Mac User Guide - Manual (Page 123)

How To
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Important note (Readiris Corporate only): Readiris automatically
recognizes barcodes to separate documents in a batch, but the
barcodes zones themselves are not recognized as barcodes.
Recognizing barcodes manually
 Scan or Open your document.
 Click the Layout icon in the Image and Layout Editing toolbar.
 Then click the Barcode icon in the menu that appears, and draw
a frame around the barcode zone.
 Close the Layout tool and process your document. The content of
the barcode will be processed as well.
Recognizing a particular barcode
In case you need to use the content of a particular barcode:
 Repeat the previous steps to draw a barcode zone.
 Ctrl-click the barcode zone and select Copy as data.
The recognized content of the barcode is copied to the Clipboard.
From there you can paste it into other applications.
Note that need to close the Layout tool in order to Ctrl-click a zone.