can't dump or read MX25L6406E chip

I've been viewing the efi bypass using a raspberry pi with this tutorial
www.ghostlyhaks.com/blog/blog/hacking/18-apple-efi-bypass

So far I have been unable to find a way to actually read or dump my chip.
Also i'm using a Raspberry Pi 2 with raspbian. I've created the "foo" directory but am still receiving errors.

I've also set this up using an arduino uno board setting up serprog with both ubuntu and windows and I'm still having the errors of not identifying the chips.

I've got Raspberry Pi 2 Model B. I have a MX25L6406E chip soldered to a Macbook pro A1278 EMC:2554 . I've hooked up all the wires according to the diagram provided for the Pi 2 Model B.
CS# - 24,
SO/SIO1 - 21
WP# - 17
GND - 39
VCC - 17
HOLD# - 17
SLCK - 23
SI/SIO0 - 19

The problem i'm running into is once I run "sudo flashrom -V -r /foo/bar.rom -p linux_spi:dev=/dev/spidev0.0" from the terminal I always receive an error:
linux_spi_init: failed to open /dev/spidev0.0: no such file or directory
Error: Programmer initialization failed.

My question is how do you know which spidevice to use or how do you list them out as well as how are you supposed to initialize the programmer in order to read and write to flash?

I'd appreciate any help possible.

I'm in hte same boat..... I was foolish to presume that I could just read the MX25L6406E chip with a standard compatible reader e.g. SkyPro. It reads the chip ok. but the info contained in the file (when its saved) is completely different to examples I've seen here..... Is it my wiring? My reader?

Do I need a raspberry pi and inux installed to read this chip accurately?

these questions would be most helpful to me as I have a long road ahead not just in the rreading the chip, but, repairing the board also

Any help suggestions welcome!

Sorry for any lame questions again!

Thats my point exactly. with regard to format that it's written to the chip in.

e.g. The firmware I downloaded for EMC# 2554, (it's a MacBook Pro "Core i5" 2.5 13" Mid-2012 2.5 GHz Core i5 (I5-3210M) I put my serial no. into the place specified. saved the file as software default (.BIN)

When I write this file to chip, it gives no errors everytime..... although, when I read the chip, saved the file, the file looks nothing like it did when I loaded it back into notepad++

1. Is this normal? as there are a lot of comments etc that I suspect would be omitted from the writing...

2. I lost the original dump of the chip as I was foolish enough to save it to a nasty cheap SD card which has failed inthe meantime.....

3. Am I completely snookered, as they say in Ireland?


any help would be great...... I'll load the dump I've read from the chip after writing firmware obtained from this site!