diff --git a/cmake/CMakeDMGSetup.script b/cmake/CMakeDMGSetup.script
index e9a826eb8..e106f6f99 100644
--- a/cmake/CMakeDMGSetup.script
+++ b/cmake/CMakeDMGSetup.script
@@ -1,54 +1,58 @@
 on run argv
 set image_name to item 1 of argv
 
-tell application "Finder"
-tell disk image_name
+-- Increase timeout from default 120 seconds to 300 seconds
+-- to account for slower CI environments (especially Intel runners)
+with timeout of 300 seconds
+    tell application "Finder"
+        tell disk image_name
 
-  -- wait for the image to finish mounting
-  set open_attempts to 0
-  repeat while open_attempts < 4
-    try
-      open
+          -- wait for the image to finish mounting
+          set open_attempts to 0
+          repeat while open_attempts < 4
+            try
+              open
+                delay 1
+                set open_attempts to 5
+              close
+              on error errStr number errorNumber
+                set open_attempts to open_attempts + 1
+                delay 10
+            end try
+          end repeat
+          delay 5
+
+          -- open the image the first time and save a DS_Store with just
+          -- background and icon setup
+          open
+            set current view of container window to icon view
+            set theViewOptions to the icon view options of container window
+            set background picture of theViewOptions to file ".background:background.tif"
+            set arrangement of theViewOptions to not arranged
+            set icon size of theViewOptions to 128
+            delay 5
+          close
+
+          -- next setup the position of the app and Applications symlink
+          -- plus hide all the window decoration
+          open
+            update without registering applications
+            tell container window
+              set sidebar width to 0
+              set statusbar visible to false
+              set toolbar visible to false
+              set the bounds to { 400, 100, 1400, 922 }
+              set position of item "Cockatrice.app" to { 139, 214 }
+              set position of item "Oracle.app" to { 139, 414 }
+              set position of item "Servatrice.app" to { 139, 614 }
+              set position of item "Applications" to { 861, 414 }
+            end tell
+            update without registering applications
+            delay 5
+          close
+
+        end tell
         delay 1
-        set open_attempts to 5
-      close
-      on error errStr number errorNumber
-        set open_attempts to open_attempts + 1
-        delay 10
-    end try
-  end repeat
-  delay 5
-
-  -- open the image the first time and save a DS_Store with just
-  -- background and icon setup
-  open
-    set current view of container window to icon view
-    set theViewOptions to the icon view options of container window
-    set background picture of theViewOptions to file ".background:background.tif"
-    set arrangement of theViewOptions to not arranged
-    set icon size of theViewOptions to 128
-    delay 5
-  close
-
-  -- next setup the position of the app and Applications symlink
-  -- plus hide all the window decoration
-  open
-    update without registering applications
-    tell container window
-      set sidebar width to 0
-      set statusbar visible to false
-      set toolbar visible to false
-      set the bounds to { 400, 100, 1400, 922 }
-      set position of item "Cockatrice.app" to { 139, 214 }
-      set position of item "Oracle.app" to { 139, 414 }
-      set position of item "Servatrice.app" to { 139, 614 }
-      set position of item "Applications" to { 861, 414 }
     end tell
-    update without registering applications
-    delay 5
-  close
-
-end tell
-delay 1
-end tell
+end timeout
 end run