In Mathematica v. 11.1.0, on OS X 10.11.6, I get the following error message when I
URLFetch::invhttp: A requested feature, protocol or option was not found built-in in this libcurl due to a build-time decision.."
This is, I gotta say, pretty weird. The documentation for
URLFetch isn't particularly helpful, of course, nor is the relevance of the function.
Anybody know what's going on? For now I can stifle the message with
Off, and stuff seems to work normally, but it has me stumped.
UPDATE: I finally had a few minutes to investigate the
libcurl situation further, and, with the help of this Stack Overflow answer was able to determine that the library in use is indeed the one which appears to have shipped with Mathematica:
At least it's not that I'm using the wrong version of the library.