Hi,
Can you click the apple icon then choose about this mac and let us know what OSX version you are running?
Can you also tell us how long you have had the 1100 series printer?
Thanks
Ok,
The problem you are going to face is that driver support for your 1100 series printer ended with OSX 10.3, The driver that is available from Lexmark may work, however Snow Leopard may not be able to use the driver from lexmark.
If you can follow this link then download the driver and try to install it http://support.lexmark.com/index?page=content&id=DR522&actp=search&viewlocale=en_US&userlocale=EN_US&segment=DOWNLOAD&productCode=LEXMARK_X1185&searchid=1259010433428
Once installed let me know if the pritner will work or if you get an error
ThanksEric