diff --git a/build.xml b/build.xml
index 2256c90f..c70af96b 100644
--- a/build.xml
+++ b/build.xml
@@ -309,7 +309,7 @@
 
 
 	<target name="appbundle" description="Build Mac application bundle" depends="revision">
-		<bundleapp outputdirectory="${dir.dist}" executablename="purchase.sh" hidedockicon="true" minimumsystemversion="${mac.version}" jvmrequired="${jvm.version}" name="${application.name}" displayname="${application.name} ${version}" version="${revision}" shortversion="${version}" identifier="${package.identifier}.Command" mainclassname="${main.class}" icon="${dir.installer}/appbundle/filebot.icns" copyright="${tstamp.year} ${package.developer}" applicationcategory="${mac.application.category}" highresolutioncapable="true" supportsautomaticgraphicsswitching="true" debug="true">
+		<bundleapp outputdirectory="${dir.dist}" executablename="filebot.launcher" hidedockicon="true" minimumsystemversion="${mac.version}" jvmrequired="${jvm.version}" name="${application.name}" displayname="${application.name} ${version}" version="${revision}" shortversion="${version}" identifier="${package.identifier}.Command" mainclassname="${main.class}" icon="${dir.installer}/appbundle/filebot.icns" copyright="${tstamp.year} ${package.developer}" applicationcategory="${mac.application.category}" highresolutioncapable="true" supportsautomaticgraphicsswitching="true" debug="true">
 			<classpath file="${path.fatjar}" />
 			<librarypath dir="${dir.lib}/native/mac-x86_64" />
 			<librarypath dir="${dir.installer}/appbundle/MacOS" />
diff --git a/installer/appbundle/MacOS/purchase.sh b/installer/appbundle/MacOS/purchase.sh
deleted file mode 100755
index 3b3c9627..00000000
--- a/installer/appbundle/MacOS/purchase.sh
+++ /dev/null
@@ -1,20 +0,0 @@
-#!/bin/sh
-
-function validate {
-	/usr/bin/codesign --verbose --deep --verify  /Applications/FileBot.app
-}
-
-function purchase {
-	/usr/bin/open https://app.filebot.net/purchase/FileBot.app
-}
-
-function help {
-	/usr/bin/open https://app.filebot.net/mac/brew.html
-}
-
-function start {
-	/usr/local/bin/filebot
-}
-
-
-validate && (start || help) || purchase
diff --git a/source/net/filebot/HistorySpooler.java b/source/net/filebot/HistorySpooler.java
index 2d4c9d0c..2da960cb 100644
--- a/source/net/filebot/HistorySpooler.java
+++ b/source/net/filebot/HistorySpooler.java
@@ -33,6 +33,7 @@ public final class HistorySpooler {
 
 	private final File persistentHistoryFile = ApplicationFolder.AppData.resolve("history.xml");
 
+	private int sessionHistoryTotalSize = 0;
 	private int persistentHistoryTotalSize = -1;
 	private boolean persistentHistoryEnabled = true;
 
@@ -101,6 +102,7 @@ public final class HistorySpooler {
 
 		if (sequence.size() > 0) {
 			sessionHistory.add(sequence); // append to session history
+			sessionHistoryTotalSize += sequence.size();
 		}
 	}
 
@@ -113,7 +115,7 @@ public final class HistorySpooler {
 	}
 
 	public synchronized int getSessionHistoryTotalSize() {
-		return sessionHistory.totalSize();
+		return sessionHistoryTotalSize;
 	}
 
 	public synchronized int getPersistentHistoryTotalSize() {
diff --git a/source/net/filebot/ui/SupportDialog.java b/source/net/filebot/ui/SupportDialog.java
index bfb7b997..9c6d4751 100644
--- a/source/net/filebot/ui/SupportDialog.java
+++ b/source/net/filebot/ui/SupportDialog.java
@@ -8,6 +8,7 @@ import static net.filebot.util.StringUtilities.*;
 import static net.filebot.util.ui.SwingUI.*;
 
 import java.util.List;
+import java.util.function.Predicate;
 import java.util.logging.Level;
 import java.util.stream.Stream;
 
@@ -49,7 +50,7 @@ public enum SupportDialog {
 		@Override
 		public boolean feelingLucky(int sessionRenameCount, int totalRenameCount, int currentRevision, int lastSupportRevision, int supportRevisionCount) {
 			// annoy users that chose not to purchase FileBot
-			if (sessionRenameCount > 0 && "Windows 10".equals(System.getProperty("os.name"))) {
+			if (sessionRenameCount > 0 && Stream.of("Mac OS X", "Windows 10").anyMatch(Predicate.isEqual(System.getProperty("os.name")))) {
 				return true;
 			}