Where can I get the software for CanoScan LiDE 500F on my Mac?
You can get the software for Mac OS X, but only for versions for OS X up to 10.5. There is no updated version of the driver and software compatible with the latest Mac releases.
To access the downloads, visit the following link: http://www.canon-europe.com/support/consumer_products/products/scanners/lide_series/canoscan_lide_500f.aspx?type=download&language=EN&os=Mac%20OS%20X%2010.5%20(Leopard)
From what I see for the other operating systems, this device hasn't received any updates since 2007.