Mumax3 is cross-platform and runs on Linux, Windows and Mac platforms. However, you need an nVIDIA GPU with compute capability 2.0 or higher (preferably higher), as listed
here. You also need to use nVIDIA's proprietary graphics driver. There is a benchmark guide on the front page of the mumax site you may find useful.
If you do not have access to an nVIDA GPU, you might find the fork
uMagNUS usable. It works with OpenCL instead of CUDA, so an Nvidia card is not required. I'm not sure if it's been tested with Mac (works with Intel and AMD), but might be suitable. Googling seems to suggest that Macbook uses an Intel i5 processor.
Josh L.