I've been looking for the same answers, I actually bought HeatSnob temperature device with my Behmor, only to find it is only good for Windows
I don't really want to buy Windows10/Parrallels/Security to run it on my Macbook, and I briefly tried installing RoastMonitor on my iMac via Win10/Parrallels, but it failed to run, so I left it at that.
I downloaded Artisan and had a fiddle with it, I haven't tried Roastlogger, but having a lot of apple devices Roastmaster App looked interesting so I bought it.
I found a iCelsius Probe on ebay (UK), am waiting for it to arrive. But at this stage, RoastMaster is the way I'm going....