Did you ever see that episode of *M*A*S*H* where they are using instructions to defuse a bomb? "... cut the blue wire ... *snip* ... but first remove the fuse."
I think we are missing a few details.
First let me say I don't have a Mac at my disposal to test this, but they are very similar to Linux commands so I am going to give you my best GUESS as to the proper steps to do this.
You have the Android SDK installed, or at least the mini-SDK that includes ADB and fastboot. You said you had it sitting on your desktop in a folder called "android" and a subfolder called "platform-tools". Are we cool so far?
Now, in that folder you have the following files ...
as well as the executables for fastboot and adb, although adb won't be necessary.
Still on the same page?
Now, put your phone into fastboot mode and plug it into your Mac. Set it down. Open a terminal and type the following:
Now you should be where you need to be. Just to verify type "ls" to list all the files. If you see the files listed above, you're golden.
Now type:
it should return "fastboot [serial number]" with your device serial number.
Got that? Great now it's time to flash.
First type
(hint, just type "fastboot flash bootloader boo" and then hit the TAB key, it should fill in the rest of the filename for you.
)
Next reboot the bootloader.
Did it work? It should.
Do the same for the radio (and reboot bootloader) and the system image, but be very careful NOT to use the "-w" option or your user data will go bye-bye.
Let us know if you get stuck again exactly where and the exact error with a screenshot would be helpful.

I think we are missing a few details.
First let me say I don't have a Mac at my disposal to test this, but they are very similar to Linux commands so I am going to give you my best GUESS as to the proper steps to do this.
You have the Android SDK installed, or at least the mini-SDK that includes ADB and fastboot. You said you had it sitting on your desktop in a folder called "android" and a subfolder called "platform-tools". Are we cool so far?
Now, in that folder you have the following files ...
Code:
bootloader-hammerhead-hhz12d.img
flash-all.bat
flash-all.sh
flash-base.sh
image-hammerhead-lrx22c.zip
radio-hammerhead-m8974a-2.0.50.2.22.img
as well as the executables for fastboot and adb, although adb won't be necessary.
Still on the same page?
Now, put your phone into fastboot mode and plug it into your Mac. Set it down. Open a terminal and type the following:
Code:
cd ~/Desktop/android/platform-tools/
Now you should be where you need to be. Just to verify type "ls" to list all the files. If you see the files listed above, you're golden.
Now type:
Code:
fastboot devices
it should return "fastboot [serial number]" with your device serial number.
Got that? Great now it's time to flash.
First type
Code:
fastboot flash bootloader bootloader-hammerhead-hhz12d.img
)Next reboot the bootloader.
Code:
fastboot reboot-bootloader
Did it work? It should.
Do the same for the radio (and reboot bootloader) and the system image, but be very careful NOT to use the "-w" option or your user data will go bye-bye.
Let us know if you get stuck again exactly where and the exact error with a screenshot would be helpful.










