diff -r aeba7bb4f4d4 -r 31fbde3baa97 lib/scripts/java-gui-setup
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lib/scripts/java-gui-setup	Tue Jan 19 14:04:31 2021 +0100
@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+#
+# java-gui-setup --- platform-specific setup for Java/Swing GUI applications
+
+if [ "$ISABELLE_PLATFORM_FAMILY" = "macos" ]
+then
+  JAVA_VERSION="$("$ISABELLE_JDK_HOME/bin/java" -version 2>&1 | head -n 1 | cut -d '"' -f2)"
+  JAVA_DOMAIN="com.azul.zulu.${JAVA_VERSION}.java"
+  defaults read "$JAVA_DOMAIN" AppleWindowTabbingMode >/dev/null 2>/dev/null ||
+    defaults write "$JAVA_DOMAIN" AppleWindowTabbingMode manual >/dev/null 2>/dev/null
+fi