Cannot create working Hassio image Pi Zero W

Hi

I am trying to install hassio on a Pi Zero W.

I downloaded the image file from

However, when I try to write the file to an SD card, the resulting card seems to be corrupted and unreadable on my Mac.

I have tried both Etcher and Apple Pi Baker as well as a number of different SD cards with the same result.

My goal is to get the image working, and edit the network file on the Mac and then boot the device to get the system on to my wifi.

Am I missing something here?

Thanks
Al