Shader invisible in Mac Player, works in Editor

Hey there,

I have a problem with my UI shaders. I use the Sprite Default shader as base for them and add my functionality in the frag function. That way I e.g. developed a highlight shader brightening an image button when hovering it. It works like a charm on Windows (Editor and Player) and on Mac in the Editor. But when exporting on Mac when hovering the button, it's just invisible. I build the Windows Player on Windows and the Mac Player on Mac.

Here is my shader:

Code (CSharp):

1. Shader "EW/UI/HighlightShader"
2. {
3.     Properties
4.     {
5.         [PerRendererData] _MainTex ("Sprite Texture", 2D) = "white" {}
6.         _Color ("Tint", Color) = (1,1,1,1)
7.         [MaterialToggle] PixelSnap ("Pixel snap", Float) = 0
8.         [HideInInspector] _RendererColor ("RendererColor", Color) = (1,1,1,1)
9.         [HideInInspector] _Flip ("Flip", Vector) = (1,1,1,1)
10.         [PerRendererData] _AlphaTex ("External Alpha", 2D) = "white" {}
11.         [PerRendererData] _EnableExternalAlpha ("Enable External Alpha", Float) = 0
12.     }
13.  
14.     SubShader
15.     {
16.         Tags
17.         {
18.             "Queue"="Transparent"
19.             "IgnoreProjector"="True"
20.             "RenderType"="Transparent"
21.             "PreviewType"="Plane"
22.             "CanUseSpriteAtlas"="True"
23.         }
24.  
25.         Cull Off
26.         Lighting Off
27.         ZWrite Off
28.         Blend One OneMinusSrcAlpha
29.  
30.         Pass
31.         {
32.         CGPROGRAM
33.             #pragma vertex SpriteVert
34.             #pragma fragment frag
35.             #pragma target 2.0
36.             #pragma multi_compile_instancing
37.             #pragma multi_compile _ PIXELSNAP_ON
38.             #pragma multi_compile _ ETC1_EXTERNAL_ALPHA
39.             #include "UnitySprites.cginc"
40.                                                    
41.              float4 frag(v2f IN) : SV_Target
42.              {
43.                  fixed4 c = SampleSpriteTexture(IN.texcoord) * IN.color;
44.                  c.rgb *= c.a;
45.                  c.r *= 1.75;
46.                  c.g *= 1.75;
47.                  c.b *= 1.75;
48.                    
49.                  return c;
50.              }
51.         ENDCG
52.         }
53.     }
54.     Fallback "Sprites/Default"
55. }
56.  

I have no idea whether it's a bug or if I'm missing some point. I'm still not used to writing shaders, but such simple stuff should behave the same on Mac and Windows imo.

I'm using Unity 2017.4.18 right now and my procedure for enabling this shader is to switch the material of the image when hovering the button and reverting to default when leaving the button.

 

Has really nobody any experience with that?

 

Because there's nothing obviously wrong with the shader. My only thought would be that your mac build is stripping the shader when for some reason the windows build is not.