OS X El Capitan Version 10.11.6
iMac (24-inch, Early 2009)
Graphics card: NVIDIA GeForce GT 130 512 MB (standard built-in)
blender-2.80.0-git20190214.a9da750aee08-x86_64 (from app file name - splash screen unreadable)
Short description of error
See screenshot. Interface is very colorful, but obviously unusable.
Granted, this is a 10 year old computer, but Blender 2.79b works like a charm.
Exact steps for others to reproduce the error
Interface appears as seen here upon launch.