macOS Update "Server Not Responding" or "Couldn’t Be Installed"? Fix It (2026)

You open Software Update, hit Update Now, and instead of downloading you get one of these:

• "The update could not be completed. The update server is not responding."
• "macOS couldn’t be installed on your computer."
• "An error occurred downloading the selected updates."
• A spinner that sits at "Checking for updates…" and never moves.

The good news: this is almost never your Mac. It’s the connection between your Mac and Apple’s update servers — either Apple is busy, your DNS is pointing at a stale server address, or a half-downloaded update is jammed. Work down this list in order and most people are updating within a few minutes.

Fix 1 — Check Apple’s system status first (30 seconds)

On the day a major macOS version ships, Apple’s servers get hammered and "server not responding" is often literally true for everyone. Before you change a single setting, open Apple’s System Status page and look for macOS Software Update.

• Green dot: Apple is fine — the problem is on your end, keep going.
• Yellow or red: it’s Apple. Wait an hour and try again — nothing you do locally will help.

Fix 2 — Restart, then retry once

A stuck update daemon is the single most common local cause. Restart the Mac (Apple menu → Restart, not just close the lid), reopen System Settings → General → Software Update, and let it sit for a full 60 seconds before you decide it’s failed. A clean reboot clears the hung "not responding" state surprisingly often.

Fix 3 — Change your DNS (fixes most "server not responding")

If Apple’s status is green but your Mac still can’t reach the update server, your router’s DNS is usually the culprit — it’s handing your Mac an outdated or slow address for Apple’s servers. Pointing your Mac at Cloudflare or Google DNS fixes it instantly in most cases:

1. Open System Settings → Network.
2. Click your active connection (Wi‑Fi or Ethernet) → Details… → DNS.
3. Under DNS Servers, click + and add 1.1.1.1 and 1.0.0.1 (Cloudflare) — or 8.8.8.8 and 8.8.4.4 (Google).
4. Click OK → Apply, then try the update again.

Full walkthrough with screenshots: How to Change DNS Settings on a Mac.

Fix 4 — Delete the stuck download and start clean

If the update got partway and then failed, the half-downloaded file blocks every retry. Clear it:

1. Open Software Update and let any "downloading" attempt stop.
2. Restart the Mac to release the file locks.
3. Reopen Software Update and start the download fresh.

For a full macOS installer that keeps failing (not just a point update), the cleanest path is a fresh installer download — see MacBook Won’t Download or Install macOS? for the step-by-step re-download.

Fix 5 — Set the date and time automatically

A wrong clock makes your Mac reject Apple’s security certificates, and the update quietly fails with a vague "couldn’t be installed." Fix it in System Settings → General → Date & Time → turn on Set time and date automatically. If it’s greyed out, unlock it, toggle it off and back on, then retry the update.

Fix 6 — Update in Safe Mode or from Recovery

If the update still won’t take, boot into Safe Mode (Apple silicon: hold the power button until "Loading startup options," pick your disk while holding Shift; Intel: hold Shift at the chime) and try again — Safe Mode strips out login items and cached junk that can jam an install. Still stuck? Reinstall macOS cleanly from Recovery Mode, which pulls a fresh copy straight from Apple and bypasses the local mess entirely.

Still failing? It might be the hardware — or the model

If you’ve worked all the way down and the update still dies — especially with kernel panics, a Mac that reboots mid-install, or a machine too old to get the version you want — you may be past the point where a software fix helps. A Mac that can’t hold a modern macOS is also a Mac that’s dropping off Apple’s security-update list, which is the real reason to move on.

You don’t have to pay full price to do it. Our Apple clearance section has fully tested MacBooks and iMacs running current macOS, each with a 1‑year warranty — and if your old one still powers on, we’ll credit it toward the upgrade.

Frequently asked questions

Why does my Mac say "the update server is not responding" when my internet works fine?

Because "internet works" and "can reach Apple’s update servers" are two different things. Your browser can load pages while your Mac still can’t resolve Apple’s update address — usually a DNS problem (Fix 3) or Apple’s servers being overloaded on launch day (Fix 1).

Is "macOS couldn’t be installed" a sign my Mac is dying?

Rarely. Nine times out of ten it’s a wrong clock (Fix 5), not enough free space, or a corrupted download (Fix 4). Only if it repeats after a clean Recovery reinstall should you suspect the drive or logic board.

How long should I wait before assuming the update failed?

Give the download a full 15 minutes on a normal connection before calling it stuck — progress bars on macOS updates lie and can sit at one spot for a long time. "Server not responding," though, is instant: if you see that message, it failed to connect, and you can go straight to the fixes.

Should I just wait a day and try again?

If Apple’s status page shows an outage (Fix 1), yes — waiting is the fix. If the status is green, waiting won’t help; the problem is local (DNS, clock, or a stuck download) and will still be there tomorrow.

Related: How to Update macOS in 2026 (step by step) and Mac stuck on "Gathering Information" during an update.