I just tried the "qtgears" OpenGL demo from http://lab.bachem-it.com/opengl/qtgears (source is included) on my MacBook and I got this error: DIAG: apple_glx_create_context: ac 0x41931730 ac->context_obj 0x4104ce00 DIAG: apple_glx_drawable_create: new drawable 0x4088a000 DIAG: create_surface: created a surface for drawable 0x600010 with uid 153 DIAG: surface_make_current: ac->context_obj 0x4104ce00 s->surface_id 21 DIAG: surface_make_current: drawable 0x600010 DIAG: applegl_bind_context: error NO fixme:wgl:X11DRV_wglGetPixelFormatAttribivARB unsupported 2008 WGL Attribute DIAG: apple_glx_drawable_create: new drawable 0x4088aa00 DIAG: offscreen rendering enabled. Using kCGLPFAOffScreen DIAG: created: pixmap buffer for 0xa0015e DIAG: apple_glx_create_context: ac 0x41967c20 ac->context_obj 0x41045c00 DIAG: apple_glx_destroy_context: ac 0x41967c20 ac->context_obj 0x41045c00 DIAG: apple_glx_create_context: ac 0x41967c20 ac->context_obj 0x41045c00 Mon Nov 7 05:51:26 mxws2.local wine[99893] <Error>: unknown error code: invalid drawable Mon Nov 7 05:51:26 mxws2.local wine[99893] <Error>: kCGErrorFailure: Set a breakpoint @ CGErrorBreakpoint() to catch errors as they are logged. set off screen: invalid drawable DIAG: applegl_bind_context: error YES X Error of failed request: 0 Major opcode of failed request: 149 (GLX) Minor opcode of failed request: 26 (X_GLXMakeContextCurrent) Serial number of failed request: 1341 Current serial number in output stream: 1341 I compiled Wine 1.3.32 on OSX using the osxwinebuilder script. It's the first time I try wine on Mac. I am using the recent XQuartz 2.7.0 for X11 and I run OSX 10.6.8. Since I am getting similar errors I thought that someone perhaps has an idea... Thanks!