Shader compilation error in the hellogles3 example on macOS

Requesting 3.3 compatibility context
QOpenGLShader::compile(Vertex): ERROR: 0:1: '' :  version '330' is not supported
ERROR: 0:2: 'layout' : syntax error: syntax error


*** Problematic Vertex shader source code ***
#version 330
#define lowp
#define mediump
#define highp
#line 1
layout(location = 0) in vec4 vertex;
layout(location = 1) in vec3 normal;
out vec3 vert;
out vec3 vertNormal;
out vec3 color;
uniform mat4 projMatrix;
uniform mat4 camMatrix;
uniform mat4 worldMatrix;
uniform mat4 myMatrix;
uniform sampler2D sampler;
void main() {
   ivec2 pos = ivec2(gl_InstanceID % 32, gl_InstanceID / 32);
   vec2 t = vec2(float(-16 + pos.x) * 0.8, float(-18 + pos.y) * 0.6);
   float val = 2.0 * length(texelFetch(sampler, pos, 0).rgb);
   mat4 wm = myMatrix * mat4(1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, t.x, t.y, val, 1) * worldMatrix;
   color = texelFetch(sampler, pos, 0).rgb * vec3(0.4, 1.0, 0.0);
   vert = vec3(wm * vertex);
   vertNormal = mat3(transpose(inverse(wm))) * normal;
   gl_Position = projMatrix * camMatrix * wm * vertex;
}


***
QOpenGLShader::compile(Fragment): ERROR: 0:1: '' :  version '330' is not supported


*** Problematic Fragment shader source code ***
#version 330
#ifdef GL_KHR_blend_equation_advanced
#extension GL_ARB_fragment_coord_conventions : enable
#extension GL_KHR_blend_equation_advanced : enable
#endif
#define lowp
#define mediump
#define highp
#line 1
in highp vec3 vert;
in highp vec3 vertNormal;
in highp vec3 color;
out highp vec4 fragColor;
uniform highp vec3 lightPos;
void main() {
   highp vec3 L = normalize(lightPos - vert);
   highp float NL = max(dot(normalize(vertNormal), L), 0.0);
   highp vec3 col = clamp(color * 0.2 + color * 0.8 * NL, 0.0, 1.0);
   fragColor = vec4(col, 1.0);
}


***

The Hello GLES3 example demonstrates easy, cross-platform usage of OpenGL ES 3.0 functions via QOpenGLExtraFunctions in an application that works identically on desktop platforms with OpenGL 3.3 and mobile/embedded devices with OpenGL ES 3.0.

The code is always the same, with the exception of two places:
- The OpenGL context creation has to have a sufficiently high version number for the features that are in use.
- The shader code's version directive is different.