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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:
HKEY_CURRENT_USER/Software/Wine/Mac Driver/Decorated and set the key value to N.
If you need help editing the registry check out this guide.
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Last modified on 2025-03-26 14:17:18 UTC by Andrew Balfour