Please help, pretty new to this but I think something is broken.

[kielwilliams]

I get constant error messages in the “Stats” window, when editing anything in a material blueprint. I don’t think I am doing anything wrong, I’ve followed several tutorials exactly and get this same error. I’ve been doing a bunch of searching online and haven’t found anyone talking about this problem. Does anyone have suggestions?

I am using a Late 2013 27in iMac with Nvidia GeForce GTX 780M 4096 MB GPU OSX 10.11.4
The exact message I get is.

Error [SM4] …/…/…/Engine/Intermediate/ShaderInC4E596D0454EE0DAF6806999EF34227D.metal(0): No such executable

Error [SM4] …/…/…/Engine/Intermediate/ShaderInB2840EC0CF46877F644AADA9DB925A68.metal(0): No such executable

Error [SM4] …/…/…/Engine/Intermediate/ShaderIn200E56217543608E4F9B428674C1262B.metal(0): No such executable

Error [SM4] …/…/…/Engine/Intermediate/ShaderIn8BC6C4B7994EE2A89EA2EAA86FD1630F.metal(0): No such executable

Error [SM4] …/…/…/Engine/Intermediate/ShaderInFAB04E57CF4A286EB3ADC2997D6C7CDC.metal(0): No such executable

Error [SM4] …/…/…/Engine/Intermediate/ShaderInB934F1FAF44E9F20DE81AEAB71D62EB5.metal(0): No such executable

Error [SM4] …/…/…/Engine/Intermediate/ShaderIn5FDE6FD403427185957A86B0B8A4C293.metal(0): No such executable

Error [SM4] …/…/…/Engine/Intermediate/ShaderIn066D41F75140F84DCBDBD9BC3D073188.metal(0): No such executable
.

[anonymous_user_6888603d]

Install Xcode - by default UE4 compiles Metal shaders to byte code as this makes runtime performance faster, but it requires the offline ‘metal’ compiler that Apple only supply with the Xcode developer tools. In UE4 4.12 this will changes that it automatically falls back to slower runtime compiled text shaders.

[kielwilliams]

Thanks! This fixed my problem.