diff --git a/macos/QMK Toolbox/MainViewController.swift b/macos/QMK Toolbox/MainViewController.swift
index 08d0f3a7b5..cdf5e98c94 100644
--- a/macos/QMK Toolbox/MainViewController.swift	
+++ b/macos/QMK Toolbox/MainViewController.swift	
@@ -120,6 +120,11 @@ class MainViewController: NSViewController, USBListenerDelegate {
             return
         }
 
+        guard FileManager.default.fileExists(atPath: file) else {
+            logTextView.logError("File does not exist")
+            return
+        }
+
         guard mcuBox.indexOfSelectedItem > 0 else {
             logTextView.logError("Please select a microcontroller")
             return
diff --git a/windows/QMK Toolbox/MainWindow.cs b/windows/QMK Toolbox/MainWindow.cs
index 482c99f795..ecbd13004f 100644
--- a/windows/QMK Toolbox/MainWindow.cs	
+++ b/windows/QMK Toolbox/MainWindow.cs	
@@ -271,6 +271,12 @@ private async void FlashAllAsync()
                 return;
             }
 
+            if (!File.Exists(filePath))
+            {
+                logTextBox.LogError("File does not exist!");
+                return;
+            }
+
             if (!windowState.AutoFlashEnabled)
             {
                 Invoke(new Action(DisableUI));