Interesting that it works at all and apparently even syncs (or does it?).
Text issue is likely something hilarious in the interplay of OpenGL's deprecated status on MacOS, Spring using OpenGL, and M1 having "apple custom integrated GPU" for graphics -- Spring has workarounds for various intel and amd gpu nonsence, but none for M1 gpu nonsense.
Running in low graphics mode of some sort could possibly be of limited help.
