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Have you installed the software that is used for a MAc?
The problem is that the NEW sierra OSX from Apple is not supported for the CM-700
Currently it only supports versions 10.9, 10.10, and 10.11
Sierra is version 10.12
See the screen shot.......sierra (version 10.12) is not listed, and therefore not supported.......atleast....not yet.
see the image link
You will have to revert BACK to the previous OSX version, in order to use the CM700 again.
It is unfortunate......but at this time, the Sierra OSX is NOT supported for the CM700
YOu can keep checking back on the Brother website and see if they put the new version up there.......or go back to the previous version of OSX.
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