diff --git a/app/assets/javascripts/discourse/lib/safari-hacks.js.es6 b/app/assets/javascripts/discourse/lib/safari-hacks.js.es6
index 42777ed4f1e..7cb249b15e2 100644
--- a/app/assets/javascripts/discourse/lib/safari-hacks.js.es6
+++ b/app/assets/javascripts/discourse/lib/safari-hacks.js.es6
@@ -1,10 +1,4 @@
-export function isAppleDevice() {
-  // IE has no DOMNodeInserted so can not get this hack despite saying it is like iPhone
-  // This will apply hack on all iDevices
-  return navigator.userAgent.match(/(iPad|iPhone|iPod)/g) &&
-         navigator.userAgent.match(/Safari/g) &&
-         !navigator.userAgent.match(/Trident/g);
-}
+import { isAppleDevice } from 'discourse/lib/utilities';
 
 // we can't tell what the actual visible window height is
 // because we cannot account for the height of the mobile keyboard
diff --git a/app/assets/javascripts/discourse/lib/show-modal.js.es6 b/app/assets/javascripts/discourse/lib/show-modal.js.es6
index c13d390925c..179a700da59 100644
--- a/app/assets/javascripts/discourse/lib/show-modal.js.es6
+++ b/app/assets/javascripts/discourse/lib/show-modal.js.es6
@@ -1,4 +1,4 @@
-import { isAppleDevice } from 'discourse/lib/safari-hacks';
+import { isAppleDevice } from 'discourse/lib/utilities';
 
 export default function(name, opts) {
   opts = opts || {};
diff --git a/app/assets/javascripts/discourse/lib/utilities.js.es6 b/app/assets/javascripts/discourse/lib/utilities.js.es6
index cba27615715..1b4cfda3492 100644
--- a/app/assets/javascripts/discourse/lib/utilities.js.es6
+++ b/app/assets/javascripts/discourse/lib/utilities.js.es6
@@ -285,6 +285,21 @@ function uploadTypeFromFileName(fileName) {
   return isAnImage(fileName) ? 'image' : 'attachment';
 }
 
+function isGUID(value) {
+  return /^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$/i.test(value);
+}
+
+function imageNameFromFileName(fileName) {
+  const split = fileName.split('.');
+  const name = split[split.length-2];
+
+  if (exports.isAppleDevice() && isGUID(name)) {
+    return I18n.t('upload_selector.default_image_alt_text');
+  }
+
+  return name;
+}
+
 export function allowsImages() {
   return authorizesAllExtensions() || IMAGES_EXTENSIONS_REGEX.test(authorizedExtensions());
 }
@@ -309,8 +324,7 @@ export function uploadLocation(url) {
 
 export function getUploadMarkdown(upload) {
   if (isAnImage(upload.original_filename)) {
-    const split = upload.original_filename.split('.');
-    const name = split[split.length-2];
+    const name = imageNameFromFileName(upload.original_filename);
     return `![${name}|${upload.width}x${upload.height}](${upload.short_url || upload.url})`;
   } else if (!Discourse.SiteSettings.prevent_anons_from_downloading_files && (/\.(mov|mp4|webm|ogv|mp3|ogg|wav|m4a)$/i).test(upload.original_filename)) {
     return uploadLocation(upload.url);
@@ -399,5 +413,13 @@ export function determinePostReplaceSelection({ selection, needle, replacement }
   }
 }
 
+export function isAppleDevice() {
+  // IE has no DOMNodeInserted so can not get this hack despite saying it is like iPhone
+  // This will apply hack on all iDevices
+  return navigator.userAgent.match(/(iPad|iPhone|iPod)/g) &&
+    navigator.userAgent.match(/Safari/g) &&
+    !navigator.userAgent.match(/Trident/g);
+}
+
 // This prevents a mini racer crash
 export default {};
diff --git a/config/locales/client.en.yml b/config/locales/client.en.yml
index 0721af6522c..cfde3d76e18 100644
--- a/config/locales/client.en.yml
+++ b/config/locales/client.en.yml
@@ -1355,6 +1355,7 @@ en:
       uploading: "Uploading"
       select_file: "Select File"
       image_link: "link your image will point to"
+      default_image_alt_text: image
 
     search:
       sort_by: "Sort by"
diff --git a/test/javascripts/lib/utilities-test.js.es6 b/test/javascripts/lib/utilities-test.js.es6
index 8ef76a79fac..00e00f4c198 100644
--- a/test/javascripts/lib/utilities-test.js.es6
+++ b/test/javascripts/lib/utilities-test.js.es6
@@ -16,6 +16,7 @@ import {
   caretRowCol,
   setCaretPosition
 } from 'discourse/lib/utilities';
+import * as Utilities from 'discourse/lib/utilities';
 
 QUnit.module("lib:utilities");
 
@@ -124,6 +125,13 @@ QUnit.test("getUploadMarkdown", assert => {
   assert.ok(testUploadMarkdown("important.txt") === '<a class="attachment" href="/uploads/123/abcdef.ext">important.txt</a> (42 Bytes)\n');
 });
 
+QUnit.test("replaces GUID in image alt text on iOS", assert => {
+  assert.equal(testUploadMarkdown("8F2B469B-6B2C-4213-BC68-57B4876365A0.jpeg"),'![8F2B469B-6B2C-4213-BC68-57B4876365A0|100x200](/uploads/123/abcdef.ext)');
+
+  sandbox.stub(Utilities, 'isAppleDevice').returns(true);
+  assert.equal(testUploadMarkdown("8F2B469B-6B2C-4213-BC68-57B4876365A0.jpeg"),'![image|100x200](/uploads/123/abcdef.ext)');
+});
+
 QUnit.test("isAnImage", assert => {
   _.each(["png", "jpg", "jpeg", "bmp", "gif", "tif", "tiff", "ico"], function(extension) {
     var image = "image." + extension;