Instruct: Classify Amazon reviews into positive or negative sentiment
Query: they didn't work with my IBM M-type keyboard and a mac

the (much more expensive) adaptors sold by clickykeyboards ended up working with my M-type keyboard. (I have a M13- I got it from e-bay - NOS. It is awesome)from what I understand, the old M-types are touchier about this sort of thing than most keyboards, so these things might work for other keyboards.