Unsupported shaders when using Metal

Hi there, I am using Unity 4.6.7 to build to iPad Air 2. The graphics API is Metal. When run from editor (both Windows & Mac), everything is fine. But when run from device, everything is pink. I got these warnings: WARNING: Shader Unsupported: 'ReaShader/IBL/UnlitIBL_Lite_Difuse' - Pass 'BASE' shader state not supported WARNING: Shader Unsupported: 'ReaShader/IBL/UnlitIBL_Lite_Difuse' - Setting to default shader. WARNING: Shader Unsupported: 'ReaShader/IBL/UnlitIBL_Lite_Difuse_Vertex Color' - Pass 'BASE' shader state not supported WARNING: Shader Unsupported: 'ReaShader/Shadow_multiply' - Pass '' shader state not supported WARNING: Shader Unsupported: 'ReaShader/Shadow_multiply' - Setting to default shader. WARNING: Shader Unsupported: 'ReaShader/IBL/UnlitIBL_Lite_Difuse' - Pass 'BASE' shader state not supported WARNING: Shader Unsupported: 'ReaShader/IBL/UnlitIBL_Lite_Difuse' - Setting to default shader. WARNING: Shader Unsupported: 'ReaShader/IBL/UnlitIBL_Lite_Difuse_Cutoff' - Pass 'BASE' shader state not supported WARNING: Shader Unsupported: 'ReaShader/IBL/UnlitIBL_Lite_Difuse_Cutoff' - Setting to default shader. WARNING: Shader Unsupported: 'Unlit/Transparent Colored' - Pass '' shader state not supported WARNING: Shader Unsupported: 'Unlit/Transparent Colored' - Pass '' shader state not supported WARNING: Shader Unsupported: 'Unlit/Dynamic Font' - Pass '' shader state not supported WARNING: Shader Unsupported: 'Unlit/Dynamic Font Front' - Pass '' shader state not supported WARNING: Shader Unsupported: 'Unlit/Transparent' - Pass '' shader state not supported WARNING: Shader Unsupported: 'Unlit/Transparent' - Setting to default shader. WARNING: Shader Unsupported: 'Unlit/Transparent Front' - Pass '' shader state not supported WARNING: Shader Unsupported: 'Unlit/Transparent Colored' - Pass '' shader state not supported WARNING: Shader Unsupported: 'Unlit/Transparent Colored' - Pass '' shader state not supported WARNING: Shader Unsupported: 'Reflective/VertexLit' - Pass 'BASE' shader state not supported If I change the graphics API to Open GL ES 2.0, everything works normally. What do I do wrong when using Metal? Are those shaders indeed unsupported?