Have a look at this link as it appears Samsung drivers work with your Lexmark. As a Lexmark X75 user I know just how frustrating that company can be when using a Mac.
Thanks for the hint, but VueScan didn't help at all.
The program just says no scanner found, please start again. Unplugging fhe device, closing VueScan, plugging in the scanner and restarting VueScan doesn't help.
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