I have tried to get an OpenBSD desktop running on my MacBookPro10,1 (the first Retina model). But I only get VESA working on a terrible res while the machine is running extremely hot. This is the case for most (all?) MacBook's with 2 GPUs.
On linux (and osx recovery mode?) one can use this script to disable the dedicated gpu and only use the integrated, intel gpu: https://github.com/0xbb/gpu-switch Could something like this help start the intel driver on OpenBSD? Thanks!