Mike / @JMikeH
Your frustration and disappointment at your purchase not working 'out of the box' is understandable and justified. I hope that among other things you will be letting your supplier know that the goods they sold were apparently not 'fit for purpose.'
It is unusual - but in the nature of things not impossible - for the RPi board itself to be DOA. In a post on these forums earlier today a spokesperson for Raspberry Pi has said: "Every single one is tested before leaving the factory." [
viewtopic.php?f=63&t=147191&p=969948#p969948 ]
Your instinct to try 'The Simplest Thing That Might Work' is a good one - but the implementation of it is flawed for reasons you don't understand yet.
To pursue that line of investigation there are 2 things you might try, assuming that you want to reuse your existing 2Gb card and keep the 'suspect' original 8Gb card as 'evidence':
1. As previously suggested, download and install Raspbian Jessie Lite.
https://downloads.raspberrypi.org/raspbian_lite_latest This is a version of the Raspbian Operating System without the components that allow it to produce a graphical display, so you will see a command-line interface only.
or
2. Download, install and run the NOOBS Lite (network install only) Installer. This is only an Installer, it is NOT a full Operating System. The only point to installing it is to prove that the RPi is capable of booting from the sd card reader.
To re-inforce what is already in the troubleshooting guide you have already referenced: the methods of installation for these two approaches are different and mutually incompatible -
To 'flash' the image of a directly installed OS such as Raspbian no prior preparation of the card is needed. The download has to be 'unpacked' to recover the .img file held within it, then that .img file has to be transferred as a bit-by-bit copy (NOT by copying the file itself) to the target SD card. The Raspberry Pi guide to doing this on a Mac is here:
https://www.raspberrypi.org/documentati ... ges/mac.md [Simply 'Copying' the .img file to the card will not work.]
To install versions of the NOOBS Installer the sd card needs to be prepared by ensuring that the entire card is formatted such that it contains a single empty fat (FAT16 or FAT32) partition. 'Safely eject' and re-insert the card before proceeding. The unpacked contents of the downloaded archive are then copied - using the standard file copying techniques on your Mac - to the the SD card. [Using low-level tools like dd or ImageWriter is NOT the right way to install NOOBS.] You should end up with an SD card that contains 3 folders and 14 other files, all at the 'root' of the sd card: they must NOT be contained within some other folder.
However you prepared the card, simply transfer it to your (unpowered) RPi, then turn the power on.