Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great Machine but be cautious if you're a Mac user!

This is a great all-in-one copying and printing machine but works poorly with apple computers! We have had so many problems setting it up with our computers since we purchased it a month ago and even after getting help from Brother's tech support (with limited knowledge on Macs) we still can't get the machine to function at its full capacity.