Operating system: MacOS 10.14.5
Graphics card: AMD
Broken: (example: 2.80, edbf15d3c044, master, 2018-11-28, as found on the splash screen)
This was working: 2.80.0-git20190711.bb7b741d2f1c-x86_64
Short description of error
In 2.80RC1 there are no addons and no way to add them.
Exact steps for others to reproduce the error
Based on the default startup or an attached .blend file (as simple as possible).