kilmo:
OK! Thanks. Any advice on how to advance? The site only shows instructions for PC users, I'm a little lost.
Baud rate is matching on board and in XCTU, but no device found. Never used XCTU before, could I be missing something?
Possibly, but
I understand from people I trust that Arduino -> HC-05 -> MacOS is just fine. All you need do is know what to do with the signal once it gets there, and I guess most of that is the same as PC anyway.
Further, I believe the notes alluded to below have been used by a Macinuser with no problems
This is an Arduino forum and not really place for discussion on anything to do with PCs - any more than Mac
Similarly, anything to do with Unix is just a read herring, and can be studiously ignored. I suspect the poster who came up with that waffle just can't read properly.
Indeed, just because you have a Macbook, it doesn't mean you are isolated. We are just talking about plain-vanilla SPP protocol
I have never heard of XCTU but I don't think it has anything to do with bluetooth.
As for your "first hurdle", no comment, I"m afraid - other than that I suspect you might be attempting the wrong hurdle.
There is nothing to indicate you need to get into AT mode, another red herring, and I suggest you just get things working. It may be all you ever need.
I am not familiar with your shield, and have never heard of XCTU, but you might find the following very basic background notes useful.
http://homepages.ihug.com.au/~npyner/Arduino/GUIDE_2BT.pdf
http://homepages.ihug.com.au/~npyner/Arduino/BT_2_WAY.ino
and I would be very interested to hear how you fare with it.
I have just realised that a possible reason why I have never heard of XCTU is that it is macinbabble, but I'm still not sure if it is relevant - indeed I dearly hope it isn't.