---
title: "Apple Developer Rosetta support ends after macOS 27, Intel-only Mac apps will stop running on Apple silicon: 2026-09-01 | Harbyn"
description: "Apple Developer Rosetta support ends after macOS 27, Intel-only Mac apps will stop running on Apple silicon, announced Sep 1, 2026."
canonical: "https://harbyn.com/changes/apple-developer/2026-09-01-upcoming-changes-to-rosetta-support-for-intel-based-macos-apps"
last-updated: 2026-10-08
---

# Apple Developer Rosetta support ends after macOS 27, Intel-only Mac apps will stop running on Apple silicon

Markdown version of <https://harbyn.com/changes/apple-developer/2026-09-01-upcoming-changes-to-rosetta-support-for-intel-based-macos-apps>.

Deprecation - Apple Developer. medium severity. Announced.

macOS 27 is the final release to support Rosetta; after it, Intel-only apps will no longer run on Apple silicon Macs (older unmaintained games excepted). From macOS 26.4, users may get a notification when launching apps that rely on Rosetta. Ship a universal or Apple silicon native build.

## Facts

| Fact | Value |
| --- | --- |
| Vendor | [Apple Developer](https://harbyn.com/vendors/apple-developer.md) |
| Kind | Deprecation |
| Severity | medium |
| Status | Announced |
| Announced | Sep 1, 2026 |
| Added to Harbyn | Oct 8, 2026 |
| Lead time | No dated deadline |
| Vendor page | <https://developer.apple.com/news/?id=w5ngl9k2> |
| Review | Reviewed by a person, extracted by a model |

## Find it in your code

```sh
npx harbyn scan
```

This change names no identifier the scanner can match line by line, so the scan tells you whether your repository uses Apple Developer, from its packages and API hosts. Nothing leaves your machine.

## Sources

Where this event comes from: the page we read, when we read it, and the hash of that snapshot.

- <https://developer.apple.com/news/rss/news.rss> (changelog, fetched 2026-10-08 17:16 UTC, sha256 `75993db37f9d7e641dc31ecb6ce0dec29cffe41907aee9542be99fa7237f7086`)

## Related changes

### More from Apple Developer

- [Multiseat purchases enabled by default for subscriptions in App Store Connect](https://harbyn.com/changes/apple-developer/2026-09-16-get-your-subscriptions-ready-for-ios-27-2.md) (Behavior change, announced Sep 16, 2026)
- [Developer ID Certification Authority (Sub-CA) certificates expire](https://harbyn.com/changes/apple-developer/2026-10-01-upcoming-expiration-of-developer-id-certification-authority-sub-ca.md) (Retirement, effective Feb 1, 2027)

### Changes at other vendors

- [AWS Lambda: Python 3.10 runtime deprecation](https://harbyn.com/changes/aws-lambda/2026-10-08-python-3-10-runtime-deprecation.md) (effective Oct 31, 2026)
- [Jira / Atlassian Cloud: Atlassian Analytics dashboard subscriptions being removed](https://harbyn.com/changes/atlassian-jira/2026-08-10-atlassian-analytics-dashboard-subscriptions-being-removed.md) (effective Nov 2, 2026)
- [Google Cloud Run and Functions: .NET 8 runtime deprecation](https://harbyn.com/changes/google-cloud/2026-10-08-net-8-runtime-deprecation.md) (effective Nov 10, 2026)
- [GitHub: X-GitHub-Stateless-S2S-Token header ignored from 2026-11-30](https://harbyn.com/changes/github/2026-10-02-x-github-stateless-s2s-token-header-ignored-from-2026-11-30.md) (effective Nov 30, 2026)

[All upcoming deadlines](https://harbyn.com/deadlines.md)