diff --git a/KCC-OSX.ui b/KCC-OSX.ui
index 3873816..bc88ec1 100644
--- a/KCC-OSX.ui
+++ b/KCC-OSX.ui
@@ -581,7 +581,7 @@
       <x>10</x>
       <y>10</y>
       <width>401</width>
-      <height>35</height>
+      <height>29</height>
      </rect>
     </property>
     <property name="font">
@@ -592,9 +592,6 @@
       <bold>true</bold>
      </font>
     </property>
-    <property name="autoFillBackground">
-     <bool>true</bool>
-    </property>
     <property name="value">
      <number>0</number>
     </property>
diff --git a/kcc.py b/kcc.py
index 95f927e..727d075 100644
--- a/kcc.py
+++ b/kcc.py
@@ -99,6 +99,11 @@ class QApplicationMessaging(QtWidgets.QApplication):
             self._server.newConnection.connect(self.handleMessage)
             self._server.listen(self._key)
 
+    def __del__(self):
+        if self._memory.isAttached():
+            self._memory.detach()
+            self._server.close()
+
     def isRunning(self):
         return self._running
 
diff --git a/kcc/KCC_gui.py b/kcc/KCC_gui.py
index 0cc6057..139a282 100644
--- a/kcc/KCC_gui.py
+++ b/kcc/KCC_gui.py
@@ -880,6 +880,8 @@ class KCCGUI(KCC_ui.Ui_KCC):
             GUI.ProgressBar.setValue(GUI.ProgressBar.value() + 1)
         elif command.isdigit():
             GUI.ProgressBar.setMaximum(int(command) - 1)
+            GUI.BasicModeButton.hide()
+            GUI.AdvModeButton.hide()
             GUI.ProgressBar.reset()
             GUI.ProgressBar.show()
         else:
@@ -909,6 +911,8 @@ class KCCGUI(KCC_ui.Ui_KCC):
 
     def hideProgressBar(self):
         GUI.ProgressBar.hide()
+        GUI.BasicModeButton.show()
+        GUI.AdvModeButton.show()
 
     def saveSettings(self, event):
         if self.conversionAlive:
@@ -1017,15 +1021,18 @@ class KCCGUI(KCC_ui.Ui_KCC):
         if sys.platform.startswith('darwin'):
             self.listFontSize = 11
             self.statusBarFontSize = 10
-            self.statusBarStyle = 'QLabel{padding-top:5px;padding-bottom:5px;border-top:2px solid #C2C7CB}'
+            self.statusBarStyle = 'QLabel{padding-top:2px;padding-bottom:3px;}'
+            self.ProgressBar.setStyleSheet('QProgressBar{padding-top:5px;text-align:center;}')
         elif sys.platform.startswith('linux'):
             self.listFontSize = 8
             self.statusBarFontSize = 8
-            self.statusBarStyle = 'QLabel{padding-top:2px;padding-bottom:3px;border-top:2px solid #C2C7CB}'
+            self.statusBarStyle = 'QLabel{padding-top:5px;padding-bottom:3px;}'
+            self.statusBar.setStyleSheet('QStatusBar::item{border:0px;border-top:2px solid #C2C7CB;}')
         else:
             self.listFontSize = 9
             self.statusBarFontSize = 8
-            self.statusBarStyle = 'QLabel{padding-top:3px;padding-bottom:3px;border-top:2px solid #C2C7CB}'
+            self.statusBarStyle = 'QLabel{padding-top:3px;padding-bottom:3px}'
+            self.statusBar.setStyleSheet('QStatusBar::item{border:0px;border-top:2px solid #C2C7CB;}')
 
         self.profiles = {
             "Kindle Paperwhite": {'Quality': True, 'ForceExpert': False, 'DefaultFormat': 0,
diff --git a/kcc/KCC_ui_osx.py b/kcc/KCC_ui_osx.py
index d4793ba..b58659d 100644
--- a/kcc/KCC_ui_osx.py
+++ b/kcc/KCC_ui_osx.py
@@ -239,14 +239,13 @@ class Ui_KCC(object):
         self.GammaSlider.setOrientation(QtCore.Qt.Horizontal)
         self.GammaSlider.setObjectName("GammaSlider")
         self.ProgressBar = QtWidgets.QProgressBar(self.Form)
-        self.ProgressBar.setGeometry(QtCore.QRect(10, 10, 401, 35))
+        self.ProgressBar.setGeometry(QtCore.QRect(10, 10, 401, 29))
         font = QtGui.QFont()
         font.setFamily("Lucida Grande")
         font.setPointSize(10)
         font.setBold(True)
         font.setWeight(75)
         self.ProgressBar.setFont(font)
-        self.ProgressBar.setAutoFillBackground(True)
         self.ProgressBar.setProperty("value", 0)
         self.ProgressBar.setAlignment(QtCore.Qt.AlignJustify|QtCore.Qt.AlignVCenter)
         self.ProgressBar.setFormat("")
diff --git a/kcc/comic2ebook.py b/kcc/comic2ebook.py
index 9c990e2..f2cffac 100755
--- a/kcc/comic2ebook.py
+++ b/kcc/comic2ebook.py
@@ -584,8 +584,7 @@ def getWorkFolder(afile):
                 path = cbx.extract(workdir)
             except OSError:
                 rmtree(workdir, True)
-                print('UnRAR/7za not found or file failed to extract!')
-                sys.exit(21)
+                raise UserWarning("Failed to extract file.")
         else:
             rmtree(workdir, True)
             raise TypeError