Format the sd card in ‘Disk Utility’ as msdos.
Then open a terminal window and run the following:
The output will have a
Disk\_partition\_scheme entry similar to:
Find your sdcard, in the above example it’s disk1.
Unzip the downloaded HS3-Pi image and place it somewhere accessible.
Go back to ‘Disk Utility’ and unmount (do not eject) the SD card partition.
Then dd the image to the sd card using something like the following:
dd is dangerous, be careful when using it. Make sure the diskX matches the number above.
You may need to wait up to 10 minutes while it copies. There won’t be any progress indicator. You can interrupt dd with CTRL-C, and you’ll see something like:
Safely remove your SD card and place it in your Raspberry Pi.
No worry, you’ll be able to enjoy a trial period :-).
To continue, please refer to the original reference material:
Also, read more @ HS3-Pi hands-on part 2