diff --git a/src/components/install/mirror/MirrorItem.vue b/src/components/install/mirror/MirrorItem.vue
index 47056c3cf..2aa134a83 100644
--- a/src/components/install/mirror/MirrorItem.vue
+++ b/src/components/install/mirror/MirrorItem.vue
@@ -10,7 +10,10 @@
     </div>
     <UrlInput
       v-model="modelValue"
-      :validate-url-fn="checkMirrorReachable"
+      :validate-url-fn="
+        (mirror: string) =>
+          checkMirrorReachable(mirror + (item.validationPathSuffix ?? ''))
+      "
       @state-change="validationState = $event"
     />
   </div>
@@ -20,8 +23,8 @@
 import { computed, onMounted, ref, watch } from 'vue'
 
 import { UVMirror } from '@/constants/uvMirrors'
-import { electronAPI } from '@/utils/envUtil'
-import { isValidUrl, normalizeI18nKey } from '@/utils/formatUtil'
+import { normalizeI18nKey } from '@/utils/formatUtil'
+import { checkMirrorReachable } from '@/utils/networkUtil'
 import { ValidationState } from '@/utils/validationUtil'
 
 const { item } = defineProps<{
@@ -39,15 +42,6 @@ const normalizedSettingId = computed(() => {
   return normalizeI18nKey(item.settingId)
 })
 
-const checkMirrorReachable = async (mirror: string) => {
-  return (
-    isValidUrl(mirror) &&
-    (await electronAPI().NetWork.canAccessUrl(
-      mirror + (item.validationPathSuffix ?? '')
-    ))
-  )
-}
-
 onMounted(() => {
   modelValue.value = item.mirror
 })
diff --git a/src/extensions/core/electronAdapter.ts b/src/extensions/core/electronAdapter.ts
index 673bc04ce..abbef6f24 100644
--- a/src/extensions/core/electronAdapter.ts
+++ b/src/extensions/core/electronAdapter.ts
@@ -1,8 +1,10 @@
+import { PYTHON_MIRROR } from '@/constants/uvMirrors'
 import { t } from '@/i18n'
 import { app } from '@/scripts/app'
 import { useDialogService } from '@/services/dialogService'
 import { useWorkflowStore } from '@/stores/workflowStore'
 import { electronAPI as getElectronAPI, isElectron } from '@/utils/envUtil'
+import { checkMirrorReachable } from '@/utils/networkUtil'
 
 ;(async () => {
   if (!isElectron()) return
@@ -60,21 +62,34 @@ import { electronAPI as getElectronAPI, isElectron } from '@/utils/envUtil'
         name: 'Python Install Mirror',
         tooltip: `Managed Python installations are downloaded from the Astral python-build-standalone project. This variable can be set to a mirror URL to use a different source for Python installations. The provided URL will replace https://github.com/astral-sh/python-build-standalone/releases/download in, e.g., https://github.com/astral-sh/python-build-standalone/releases/download/20240713/cpython-3.12.4%2B20240713-aarch64-apple-darwin-install_only.tar.gz. Distributions can be read from a local directory by using the file:// URL scheme.`,
         type: 'url',
-        defaultValue: ''
+        defaultValue: '',
+        attrs: {
+          validateUrlFn(mirror: string) {
+            return checkMirrorReachable(
+              mirror + PYTHON_MIRROR.validationPathSuffix
+            )
+          }
+        }
       },
       {
         id: 'Comfy-Desktop.UV.PypiInstallMirror',
         name: 'Pypi Install Mirror',
         tooltip: `Default pip install mirror`,
         type: 'url',
-        defaultValue: ''
+        defaultValue: '',
+        attrs: {
+          validateUrlFn: checkMirrorReachable
+        }
       },
       {
         id: 'Comfy-Desktop.UV.TorchInstallMirror',
         name: 'Torch Install Mirror',
         tooltip: `Pip install mirror for pytorch`,
         type: 'url',
-        defaultValue: ''
+        defaultValue: '',
+        attrs: {
+          validateUrlFn: checkMirrorReachable
+        }
       }
     ],
 
diff --git a/src/utils/networkUtil.ts b/src/utils/networkUtil.ts
index 65ea23bd8..a4a93d4f3 100644
--- a/src/utils/networkUtil.ts
+++ b/src/utils/networkUtil.ts
@@ -1,5 +1,8 @@
 import axios from 'axios'
 
+import { electronAPI } from './envUtil'
+import { isValidUrl } from './formatUtil'
+
 const VALID_STATUS_CODES = [200, 201, 301, 302, 307, 308]
 export const checkUrlReachable = async (url: string): Promise<boolean> => {
   try {
@@ -10,3 +13,14 @@ export const checkUrlReachable = async (url: string): Promise<boolean> => {
     return false
   }
 }
+
+/**
+ * Check if a mirror is reachable from the electron App.
+ * @param mirror - The mirror to check.
+ * @returns True if the mirror is reachable, false otherwise.
+ */
+export const checkMirrorReachable = async (mirror: string) => {
+  return (
+    isValidUrl(mirror) && (await electronAPI().NetWork.canAccessUrl(mirror))
+  )
+}