by defeX! » May 15 07 4:01 pm
After doing some research, it seems that Safari doesn't natively support NTLM. However, there does seem to be some plugins available that will add support for NTLM. The plugin I found was for Python itself, rather than the Safari application only, and is called NTLMAPS. Maybe this information will help.
I also found a brief source which mentioned that OSX 10.4.2 natively supported NTLM. I cannot be sure how accurate the source is though.