--- VirtualBox-6.0.8/include/VBox/VBoxGL2D.h~	2019-05-13 15:23:12.000000000 +0200
+++ VirtualBox-6.0.8/include/VBox/VBoxGL2D.h	2019-07-13 17:31:31.183251092 +0200
@@ -111,7 +111,7 @@
 typedef GLvoid (APIENTRY *PFNVBOXVHWA_UNIFORM4I)(GLint location, GLint v0, GLint v1, GLint v2, GLint v3);
 
 /* GL_ARB_pixel_buffer_object*/
-#ifndef Q_WS_MAC
+#if 0
 /* apears to be defined on mac */
 typedef ptrdiff_t GLsizeiptr;
 #endif