Cant install the engine on my Mac i keep getting an error when i try opening the installer. error displays as follows:

Error accessing ShaderTech "LaserN" in Shader "Main".
Pixel Shader compilation failed:
WARNING: 0:2: extension 'GL_EXT_shader_texture_lod' is not supported
WARNING: 0:3: extension 'GL_EXT_shadow_samplers' is not supported
ERROR: 0:19: '' : syntax error: #extension must always be before any non-preprocessor tokens
Pixel Shader code:
#extension GL_ARB_shader_texture_lod:enable
#extension GL_EXT_shader_texture_lod:enable
#extension GL_EXT_shadow_samplers:enable
#ifdef GL_ES
#define texture2DLod texture2DLodEXT
#define shadow2DProj shadow2DProjEXT
#define LP lowp
#define MP mediump
#define HP highp
precision LP float;
precision LP int;
#else
#define LP
#define MP
#define HP
#endif
varying vec4 GL_Tex0;
varying vec4 GL_Tex1;
#extension GL_ARB_draw_buffers:require
struct DeferredSolidOutput{
vec4 _out0;
vec4 _out1;
vec4 _out2;
};
DeferredSolidOutput _output1;
vec3 _TMP159;
float _x0164;
vec3 _TMP165;
float _x0170;
float _TMP173;
float _x0174;
float _y0174;
float _TMP179;
float _b0184;
DeferredSolidOutput this190;
vec3 _color0191;
DeferredSolidOutput this195;
DeferredSolidOutput this197;
uniform float _Step;

Hi,
Can you let me know your Mac model and GPU?
Thanks

Model Name: MacBook Pro
Model Identifier: MacBookPro11,5
Processor Name: Intel Core i7
Processor Speed: 2.5 GHz
Number of Processors: 1
Total Number of Cores: 4
L2 Cache (per Core): 256 KB
L3 Cache: 6 MB
Memory: 16 GB
Chipset Model: AMD Radeon R9 M370X
Type: GPU
Bus: PCIe
PCIe Lane Width: x8
VRAM (Total): 2048 MB
Vendor: ATI (0x1002)
Device ID: 0x6821
Revision ID: 0x0083
ROM Revision: 113-C5670E-777
Automatic Graphics Switching: Supported
gMux Version: 4.0.20 [3.2.8]
EFI Driver Version: 01.00.777
Metal: Supported
Displays:
Color LCD:
Display Type: Retina LCD
Resolution: 2880 x 1800 Retina
Retina: Yes
Pixel Depth: 32-Bit Color (ARGB8888)
Main Display: Yes
Mirror: Off
Online: Yes
Automatically Adjust Brightness: No
Built-In: Yes
Intel Iris Pro:

Chipset Model: Intel Iris Pro
Type: GPU
Bus: Built-In
VRAM (Dynamic, Max): 1536 MB
Vendor: Intel (0x8086)
Device ID: 0x0d26
Revision ID: 0x0008
Automatic Graphics Switching: Supported
gMux Version: 4.0.20 [3.2.8]
Metal: Supported

Thank you, I'll see what I can do.

Many thanks for reporting the problem, it should be OK now.

Please try re-downloading the Installer.