I am getting these errors when opening the material node editing window to change the material color:
> LogShaderCompilers: /tmp/10135_3416441198.metal(0): Metal Shared PCH generation failed - cannot find metal_stdlib header relative to /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin locally.
> LogShaderCompilers: /tmp/10135_3416441198.metal(0): Failed to load output file: /tmp/ShaderInA09484EB144688FAA58438BC3F94E3EE
Engine version: 4.19.2
Xcode: 10.1
Mac OS: Mojave 10.14.2
Please help!