Create Hello world for macOS (#1)

util/rm-mac-geom

@@ -0,0 +1,9 @@
+#!/bin/bash -e
+
+killall cfprefsd 2>/dev/null || true
+sleep 1
+
+rm -f $HOME/Library/Preferences/OGS\ Mahjong.plist \
+      $HOME/Library/Preferences/org.opengamestudio.Mahjong.plist
+
+echo "removed app preferences (window geometry)"