0 fullscreen modes available on 14inch macbook pro

[eXpl0it3r]

Checking the specs it seems like 3456x2234 is the native resolution of you mac book: https://support.apple.com/kb/SP858?locale=en_US#:~:text=3456%2Dby%2D2234%20native%20resolution

Which means you may actually be using dome DPI scaling to get a different resolution.
I don't know how that's configured on macOS exactly, but do you have DPI scaling enabled?

[md81544]

Those specs you quote are for the macbook pro (which is what the OP is using). The specs for my M2 air are here: https://www.apple.com/uk/macbook-air-m2/specs/  and confirms 2560x1664 native resolution.

I don't have DPI scaling enabled as far as I am aware. The only option in settings seems to be some vague "Larger Text", "Default", or "More Space" which scales everything up or down. I tried all of them when I initially saw the problem and got the segfault that the OP initially reported on all of those settings.

[md81544]

So if I comment out the line here

https://github.com/SFML/SFML/blob/82b48a7520a2eb83576ec16d68ff9ea6d3d5d5bd/src/SFML/Window/OSX/cg_sf_conversion.mm#L94

then the modes which come back from getFullscreenModes() look more like what I'd expect for my Macbook Air M2:

Mode #0: 2560x1664 - 32 bpp
Mode #1: 2560x1600 - 32 bpp
Mode #2: 2048x1332 - 32 bpp
Mode #3: 2048x1280 - 32 bpp
Mode #4: 1920x1200 - 32 bpp

So the issue is possibly related to whether pixels or points are returned from CGDisplayModeGetWidth() etc ?

Edit:  I've just been looking at this thread https://stackoverflow.com/questions/42024942/cgdisplaymodegetwidth-height-sometimes-returns-pixels-sometimes-points

I wonder whether the comment "The scaling factor for all modes is not the same. Some are 1:1, some are 2:1. A mode of size 1680x1050 points does not imply a pixel size of 3360x2100" is relevant?

[md81544]

As this appears to be a bug, shall I summarise this in a github issue?

[eXpl0it3r]

Yes, please do so! Thanks for investigating

[md81544]

https://github.com/SFML/SFML/issues/2300