Canoscan N1240U and OS X 10.6.x Snow Leopard
Having seen MANY other threads on the topic and having done lots of playing myself, I thought I would share how I got my scanner working today.
1. I downloaded both the Canoscan Toolbox and the latest drivers from here: http://www.usa.canon.com/consumer/controller?act=ProductCatIndex1Act&fcategoryid =104
Note that they are ONLY available from the US site. The European/UK site which I originally went to only has version 4 driver for 10.1.x and will not work as it is Classic 9 binary.
2. Change your account to have full Admin rights within the Accounts pane. For some reason, none of it is happy installing without those rights.
3. Install the drivers first. They will be installed to your System area. Reboot.
4. Install the Canoscan Toolbox to Applications. You MUST have this installed for the scanner to work.
5. Install the drivers AGAIN. This time the installer will put them in the Canoscan folder in Applications. Reboot again.
6. Plug in your scanner. At this point you will think it is broken. It isn't. OSX will find it but, unlike under Windows, it will not do make a short calibration whirring noise as if it is scanning.
7. Run Canoscan Toolbox and set-up the buttons and Settings as you want.
8. Press one of the button on the front of the Scanner (Copy, Scan or Email). Personally, I have the "Email" button set to scan the document and create a PDF as I am increasingly going paperless and scan most things rather than filing.
9. The software & scanner should start calibrating at this point and start scanning. You can leave it running or cancel as not, it is entirely up to you, as long as you have the warm glow of satisfaction at having got an 8 year old piece of kit working with Snow Leopard.
Best Regards
GeekDaddy
MacBook Black 2GHz Intel Core Duo, Mac OS X (10.6), iPhone 3G. Switched in 2008 after 15 years on Windows & loving it.