I post this question months ago. In the meantime I purchased Affinity on two different Macbook. Everything was fine until I recently update one of them. From this update (1.9.0) my Mos files cannot be open properly. They all open with a red layer on it and very dark. No way to process those raw files. I tried to change all the settings in the assistant (seriff labs/Apple, and other settings), but still the same result. On the other computer, I didn't update to the last version and it works well. What was changed in the last update? How can I solve the problem? At the moment I cannot use Affinity as it doesn't work.