Hi @zturtleman, thanks for your response! I know this is almost a two year post, but I happen to have the same issue as the OP, and unfortunately test builds seem to be taken offline (according to this page https://ioquake3.org/get-it/test-builds/) and the link you posted to macOS players guide returns 404.
Any idea how does one get this running on macOS these days?
The last line in the log for me says GL_RENDERER: ATI Radeon R9 M370X OpenGL Engine. Then it crashes. This is actually somewhat odd, because my 2015 MacBook Pro has Intel Iris Pro 1536 MB.
Also I’m running macOS Mojave, if that makes any difference.