diff --git a/resources/wx_gui/gui_download.py b/resources/wx_gui/gui_download.py
index 81d56ac4b..8fb629042 100644
--- a/resources/wx_gui/gui_download.py
+++ b/resources/wx_gui/gui_download.py
@@ -79,7 +79,7 @@ class DownloadFrame(wx.Frame):
             )
 
             progress_bar.SetValue(int(self.download_obj.get_percent()))
-            wx.GetApp().Yield()
+            wx.Yield()
 
         if self.download_obj.download_complete is False and self.user_cancelled is False:
             wx.MessageBox(f"Download failed: \n{self.download_obj.error_msg}", "Error", wx.OK | wx.ICON_ERROR)
diff --git a/resources/wx_gui/gui_entry.py b/resources/wx_gui/gui_entry.py
index 3100067e0..f8e57f242 100644
--- a/resources/wx_gui/gui_entry.py
+++ b/resources/wx_gui/gui_entry.py
@@ -83,7 +83,7 @@ class EntryPoint:
         logging.info("- Cleaning up wxPython GUI")
 
         self.frame.SetTransparent(0)
-        wx.GetApp().Yield()
+        wx.Yield()
 
         self.frame.DestroyChildren()
         self.frame.Destroy()
diff --git a/resources/wx_gui/gui_install_oc.py b/resources/wx_gui/gui_install_oc.py
index bc28e2e28..7d083fc40 100644
--- a/resources/wx_gui/gui_install_oc.py
+++ b/resources/wx_gui/gui_install_oc.py
@@ -263,7 +263,7 @@ class InstallOCFrame(wx.Frame):
         thread.start()
 
         while thread.is_alive():
-            wx.GetApp().Yield()
+            wx.Yield()
 
         if self.result is True:
             if self.constants.update_stage != gui_support.AutoUpdateStages.INACTIVE:
diff --git a/resources/wx_gui/gui_main_menu.py b/resources/wx_gui/gui_main_menu.py
index 2e375ba78..d8c5fcf8b 100644
--- a/resources/wx_gui/gui_main_menu.py
+++ b/resources/wx_gui/gui_main_menu.py
@@ -1,7 +1,6 @@
 # Generate GUI for main menu
 import wx
 import sys
-import time
 import logging
 import threading
 
diff --git a/resources/wx_gui/gui_support.py b/resources/wx_gui/gui_support.py
index acf363035..b811a940d 100644
--- a/resources/wx_gui/gui_support.py
+++ b/resources/wx_gui/gui_support.py
@@ -9,7 +9,7 @@ import applescript
 from pathlib import Path
 
 from resources import constants
-from data import model_array, os_data, cpu_data, smbios_data
+from data import model_array, os_data, smbios_data
 
 
 class AutoUpdateStages:
@@ -194,7 +194,7 @@ class RestartHost:
         if answer == wx.ID_YES:
             # Reboots with Count Down prompt (user can still dismiss if needed)
             self.frame.Hide()
-            wx.GetApp().Yield()
+            wx.Yield()
             try:
                 applescript.AppleScript('tell app "loginwindow" to «event aevtrrst»').run()
             except applescript.ScriptError as e:
@@ -270,13 +270,13 @@ class RelaunchApplicationAsRoot:
         # Set size of frame
         self.frame.SetSize((-1, countdown_label.GetPosition().y + countdown_label.GetSize().height + 40))
 
-        wx.GetApp().Yield()
+        wx.Yield()
 
         logging.info(f"- Relaunching as root with command: {program_arguments}")
         subprocess.Popen(args, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
 
         while True:
-            wx.GetApp().Yield()
+            wx.Yield()
             countdown_label.SetLabel(f"Closing old process in {timer} seconds")
             time.sleep(1)
             timer -= 1
diff --git a/resources/wx_gui/gui_sys_patch.py b/resources/wx_gui/gui_sys_patch.py
index 94dc1537a..4ddf44ac2 100644
--- a/resources/wx_gui/gui_sys_patch.py
+++ b/resources/wx_gui/gui_sys_patch.py
@@ -87,7 +87,7 @@ class SysPatchFrame(wx.Frame):
         kdk_thread.start()
 
         while kdk_thread.is_alive():
-            wx.GetApp().Yield()
+            wx.Yield()
 
         if self.kdk_obj.success is False:
             progress_bar_animation.stop_pulse()
@@ -115,7 +115,7 @@ class SysPatchFrame(wx.Frame):
 
         subheader.SetLabel("Checking if checksum is valid...")
         subheader.Center(wx.HORIZONTAL)
-        wx.GetApp().Yield()
+        wx.Yield()
 
         progress_bar_animation.stop_pulse()
 
@@ -372,7 +372,7 @@ class SysPatchFrame(wx.Frame):
         thread.start()
 
         while thread.is_alive():
-            wx.GetApp().Yield()
+            wx.Yield()
 
         self._post_patch()
         self.return_button.Enable()
@@ -397,7 +397,7 @@ class SysPatchFrame(wx.Frame):
         thread.start()
 
         while thread.is_alive():
-            wx.GetApp().Yield()
+            wx.Yield()
 
         self._post_patch()
         self.return_button.Enable()
diff --git a/resources/wx_gui/gui_update.py b/resources/wx_gui/gui_update.py
index 75348d46e..03a43e7e5 100644
--- a/resources/wx_gui/gui_update.py
+++ b/resources/wx_gui/gui_update.py
@@ -147,7 +147,7 @@ class UpdateFrame(wx.Frame):
         while True:
             launch_label.SetLabel(f"Closing old process in {timer} seconds")
             launch_label.Center(wx.HORIZONTAL)
-            wx.GetApp().Yield()
+            wx.Yield()
             time.sleep(1)
             timer -= 1
             if timer == 0: