System Information
Operating system: mac os version 10.14.5
Graphics card: Radeon Pro Vega 56 8 GB

Blender Version
Broken: Blender 2.8 rc 1{F7603592}
Worked: (optional)

Short description of error
Cycles does not appear in the menu
Exact steps for others to reproduce the error
Based on the default startup or an attached .blend file (as simple as possible).