Could be related to viewtopic.php?t=71212.
It works fine with preferred-display-index=0, but gives the above error on start with preferred-display-index=1. Display index 1 is an iPad Air 4th Gen being used as an external display using Sidecar. I've played Factorio many times with my actual monitor with no issues, so it isn't just 'no external monitors work'. Changing `full-screen` or running without Steam makes no difference.
Factorio does run on the iPad display if "Preferred screen" is set to the iPad display after starting it on the main display.
(I don't particularly mind if this gets fixed or not; I don't intend to do lots of mod dev with an iPad as a 2nd screen!)
[1.1.39] Error on start with Sidecar (Failed to create OpenGL context: Failed creating OpenGL pixel format)
Post your bugs and problems so we can fix them.
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