---
id: troubleshooting.update-failed-notarization-check
url: https://storagestudio.us/faq/troubleshooting/update-failed-notarization-check
category: "Troubleshooting & messages"
subcategory: "Updates and installing"
question: "What does \"Apple notarization check failed on the downloaded update\" mean?"
alt_questions:
  - "apple notarization check failed on the downloaded file"
  - "gatekeeper wouldn't accept this dmg"
  - "update failed notarization"
  - "open download in browser storage studio update"
short_answer: "The downloaded update didn't pass Apple's genuineness check (usually incomplete or damaged), so it wasn't installed. Retry, or use Open download in browser for a fresh copy."
tags: ["update", "notarization", "gatekeeper"]
related: ["https://storagestudio.us/faq/troubleshooting/update-failed-verification-discarded", "https://storagestudio.us/faq/troubleshooting/update-couldnt-be-installed"]
applies_to: "all"
last_reviewed: 2026-10-01
---

# What does "Apple notarization check failed on the downloaded update" mean?

Before installing an update, Storage Studio confirms with macOS that the download is genuine and approved by Apple. This download didn't pass — usually because it was incomplete or damaged on the way. It was not installed.

Try the update again. If it fails again, use **Open download in browser** to download a fresh copy from storagestudio.us and install it by dragging it to Applications.