diff --git a/gui/build.py b/gui/build.py
index 0f802d178..f4c6e70ba 100644
--- a/gui/build.py
+++ b/gui/build.py
@@ -12,7 +12,7 @@
 import subprocess
 import sys
 import tarfile
-from pathlib import Path
+# from pathlib import Path
 
 IS_WIN = os.name == "nt"
 IS_MAC = sys.platform == "darwin"
@@ -92,7 +92,7 @@ def do_bundle(options):
         makensis_path = os.path.join(options.nsis_path, "makensis.exe")
         call(makensis_path, "wininst.nsi", cwd="wininst")
     elif IS_MAC:
-        Path("dist/mozregression GUI").unlink()
+        # Path("dist/mozregression GUI").unlink()
         with tarfile.open("mozregression-gui-app-bundle.tar.gz", "w:gz") as tar:
             tar.add(r"dist", arcname="mozregression-gui-app-bundle")
     else:
diff --git a/gui/gui.spec b/gui/gui.spec
index 0440b6947..e8a61bfc4 100644
--- a/gui/gui.spec
+++ b/gui/gui.spec
@@ -1,7 +1,6 @@
 # -*- mode: python -*-
 import sys
 from PyInstaller.utils.hooks import (collect_all, collect_submodules)
-from mozregression.pyinstaller import BUNDLE_WITH_TK
 
 IS_MAC = sys.platform == "darwin"
 
@@ -18,38 +17,35 @@ for pkgname in ['glean', 'glean_parser', 'mozregression', 'yamllint', 'bs4']:
 # https://github.com/pypa/setuptools/issues/1963
 hiddenimports.extend(collect_submodules('pkg_resources'))
 
-analysis_kwargs = {
-    "binaries": binaries,
-    "datas": datas,
-    "hiddenimports": hiddenimports,
-    "hookspath": [],
-    "excludes": [],
-    "win_no_prefer_redirects": False,
-    "win_private_assemblies": False,
-    "cipher": block_cipher,
-    "noarchive": False
-}
-if IS_MAC:
-    analysis_kwargs["runtime_hooks"] = ["splash_hook.py"]
-
-a = Analysis(['mozregression-gui.py'], **analysis_kwargs)
+a = Analysis(['mozregression-gui.py'],
+             binaries=binaries,
+             datas=datas,
+             hiddenimports=hiddenimports,
+             hookspath=[],
+             runtime_hooks=[],
+             excludes=[],
+             win_no_prefer_redirects=False,
+             win_private_assemblies=False,
+             cipher=block_cipher,
+             noarchive=False)
 pyz = PYZ(a.pure, a.zipped_data, cipher=block_cipher)
 
 if IS_MAC:
     exe = EXE(pyz,
             a.scripts,
-            a.binaries,
-            a.zipfiles,
-            a.datas,
             [],
+            exclude_binaries=True,
             name='mozregression GUI',
             debug=False,
             bootloader_ignore_signals=False,
             strip=False,
             upx=False,
-            console=False,
-            target_arch="universal2")
-    app = BUNDLE_WITH_TK(exe,
+            target_arch="universal2",
+            console=False)
+    app = BUNDLE(exe,
+                a.binaries,
+                a.zipfiles,
+                a.datas,
                 strip=False,
                 upx=True,
                 name='mozregression GUI.app',