The heuristics that Wine uses to decide whether or not to trim off the edges of windows and replace them with the platform-native window decorations are imperfect. The Mac driver, like the X11 driver, has a registry setting to turn off window decorations for situations like this. Unfortunately, the Mac driver's setting can't be controlled using winecfg. You have to set it using regedit:
[HKCU\Software\Wine\Mac Driver]
"Decorated"="n"
If you need help editing the registry check out this guide.
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Last modified on 2023-09-29 18:18:40 UTC by Andrew Balfour