I downloaded the SAIO Tester image from Github and it is 707.5 mb not 675 mb as described.
I am on OS X 10.11.6 and use Etcher but it gives an error message "Unsupported Compression Method 9" when I try to burn image to SD.
I also tried unzipping but I get a .cpgz file that is not recognized by Etcher.

I am rather Noob on this front so any help appreciated!
Thanks
PS: Funny how I was not intimidated by any soldering for the SAIO at all but the software side is not my comfort zone!
