Why can't OSX detect android Galaxy S for USB debugging?

Question

I searched for similar questions on this issue but found none related to Mac OSX.

Situation:
Trying to test android apps on a Galaxy S (D

Answer 1

None of these things worked for me. I'm running 4.4.2 on an LG VS450PP, trying to connect to a Mac laptop running OS X 10.10.5. Neither MTP nor PTP worked at all, even after following all the suggestions listed here and elsewhere on SO. I only got the RSA message when I chose the Internet option from the USB settings (and then I chose Ethernet).

After that, it was golden.