I just finished working my way through the 12 pages of the thread which lead to this one, and now through these two pages. I noted that several times Mac users asked how to do this on a Mac and, with the exception of the Mac user who used a Windows emulator, no one responded.
Nevertheless, I downloaded the Mac versions of the SDK and the separate folder that contains adb, and I tried repeatedly to follow the instructions in Terminal on the Mac, using what I believe to be the Mac syntax. I think I used the right path to get adb to run, because all the adb examples pop up in the Terminal window, but then nothing happens to my connected LG Optimus to change anything.
I have USB debugging turned on, but even when I run adb devices as a test, nothing happens, suggesting to me that my Mac is not seeing the connected LG, which runs 2.2.1.
Any help or advice would be greatly appreciated, as I spent last night and all afternoon trying this over and over out of determination to succeed, and am feeling defeated at this point.