<p>In my opinion it's not a title bar but rather a tab created by macOS. I believe we already had something like that reported elsewhere (not sure if it was mailing list or bug report, can't find it now) where macOS adds an extra tab when</p>
<p>System Preferences->Dock->Prefer tabs when opening documents</p>
<p>is set to "Always". Geany is not a native macOS application and unfortunately doesn't have a control over this extra tab.</p>

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