I 've gone and bought another Pi3, a 3B+ this time, and am going to experiment with kali-linux, however my experimentation hasn't got off to a good start!
I have downloaded (on my Mac) the latest file for the Pi from the oficial kali www site, and now have a 1.5GB file that ends with .img.xz
Never heard of an .xz file and I am a tad stumped as to what I need to do with this file, as Etcher won't recognise this format to write it to the MicroSD card I have. Am I supposed to extract this 'xz' file before being able to do anything further with the kali-linux installation process?
Any advice greatly appreciated. Thanks all.