Developer Notes

It is failing trying to load a .usf file that isn't present:

[2015.09.22-15.32.40:375][ 0]LogMac:Error: appError called: Assertion failed: Assertion failed: File:/Users/build/BuildFarm/build_++depot+UE4-Releases+4.9/Engine/Source/Runtime/ShaderCore/Private/ShaderCore.cpp [Line: 357]
Couldn't load shader file 'LpvDirectionalOcclusion'

This isn't a bug in any Mac specific code - this shader isn't found on his system either because it wasn't bundled into the build (but should have been according to P4), or his install is incomplete, or because he's running a case-sensitive file-system (which we don't support on OS X).


User reporting he is crashing when launching the Editor

"This is a 4.9.1 binary build (latest), I can't give you the exact version because it crashes on the initialisation stage at 0%. The system is a mac mini i5 running osx 10.10.5."

The user also mentioned he does not receive this crash in 4.8.3 - 2634408

Could not reproduce on the Mac we have here.

Tested in Binary 4.9.1 - 2689999

Link to Crash Reporter
[Link Removed]

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ComponentUE - Graphics Features
Affects Versions4.9.1
CreatedSep 24, 2015
ResolvedNov 2, 2015
UpdatedJul 14, 2021
View Jira Issue