Implementing the OpenGL 4.5 API, the Mesa 19.0 graphics stack is finally here after an extended development cycle that took place over the last three months. It brings dozens of new features, new extensions, and countless bug fixes. Highlights of this major new series includes support for AMD Radeon Vega 10, Vega 20, and Vega M GPUs, GNU Hurd support, and LLVM 7 compatibility. The Mesa 19.0 graphics stack also comes with numerous new extensions for both OpenGL and Vulkan technologies. For OpenGL, we can mention GL_AMD_texture_texture4 for all OpenGL 4.0 drivers, shader-based software implementations of GL_ARB_vertex_attrib_64bit, GL_ARB_shader_ballot, GL_ARB_gpu_shader_fp64, and GL_ARB_gpu_shader_int64 for the i965 driver, as well as the GL_NV_shader_atomic_float extension for the nvc0 driver supporting only Fermi/Kepler.