Need midi usb driver for Casio WK-110

Maybe you could contact this guy at his blog. Scroll down to his entry "The Piano Man". He wrote the following

February 21st, 2009
" I was able to find some dude on the internet who created some Mac drivers for this keyboard so it definitely works with Garageband. "

http://www.tomedian.com/

Maybe he can send you a link to "some dude" for a driver.

I did find it.
A few months ago I put this on my Macbook but I forgot where I got it when I wanted to put it on the iMac. That's why I came here. I can't believe with the popularity of Casio and Mac with musicians that this is so difficult to find. I hope it works for you and other future searchers .
I found the link to the driver here.
http://www.pianoworld.com/forum/ubbthreads.php/ubb/showflat/Forum/6/topic/005123 /Number/0/site_id/1#import
and it linked to here where the driver actually is.
http://code.google.com/p/casiousbmididriver/

I'm not very savvy with internal workings of Mac's but I think you need to be a little carful where and how you instal it.
Their instructions are to put it in the "Library/Audio/MIDI Drivers folder in your home folder or your system's hard-drive."

What worked for me was;
From the desktop (where the file was after download) I dragged the file into my Midi Drivers folder that's in the Audio folder that's in the Library folder that's in the Hard Drive , not the little house.
so the sequence is HD>Library>Audio>Midi Drivers.
Then , just to play it safe I restarted the computer.

I don't know anything about the Casio WK-110 but have you opened the "Audio MIDI Setup" application (probably in your utilities folder) to see if it can be added or recognized as a MIDI device?

What did Casio say about a driver?

I am assuming you tried this site for your driver?
http://code.google.com/p/casiousbmididriver/wiki/Compatibility

Casio is known for not being especially compatible with Macs. You could always use it as a real instrument or connect thru an interface.

Did you ever find it?
I found one awhile back for my macbook. It work with my Privia 320. I'd like to put it in my imac but I don't remember where I found it??? duh

should garageband just recognize the keyboard automatically when I plug it in?

yes

Is there a snow leopard update for the driver? Ever since I've upgraded my keyboard has ceased to function with it.