Registered just for that issue.
Tried steam download AND appstore download. Tried the lowest graphic settings and altered difficulties.
Both installations - same problem:
After walking down the eerie path of memory in the in-between and being sucked in by the adra, game is not responding (black screen, beachball).
MacBook Pro (Retina, 15', mid 2014)
2,2 GHz i7
16 GB 1600 MHz DDR3 RAM
Intel Iris Pro 1536 MB
I hope Obsidian fixes this as soon as possible for I am very eager to start playing.