How Long Does It Take to Update macOS?

Quick Answer

Updating macOS usually takes 30 to 60 minutes from start to finish. A small point update (like 15.1 to 15.2) can finish in 10–30 minutes, while a major upgrade to a whole new version (like Sonoma to Sequoia) typically takes 45–90 minutes including download and installation. Your internet speed, Mac model, and drive type (SSD vs. older Fusion Drive) all affect the total time.

macOS Update Time by Type

Update Type	Download	Install	Total
Security/patch update	2–10 min	5–15 min	10–25 min
Minor point update (x.x.1)	5–15 min	10–20 min	15–35 min
Major version upgrade	15–45 min	30–60 min	45–90 min
Fresh install / erase & reinstall	15–45 min	30–45 min	45–90 min

The Update Process Stage by Stage

1. Download the update — the installer downloads in the background while you keep working
2. Preparation / verification — macOS verifies and prepares the update (5–15 minutes; the progress bar may appear stuck)
3. Restart and install — the Mac restarts and applies the update on a black screen with a progress bar (15–45 minutes)
4. Final setup — first boot may take a few extra minutes to optimize the system

Factors That Affect Update Time

Internet Speed

The macOS installer can be 5–14 GB. On a slow connection, downloading is the longest single step. On gigabit fiber it's a few minutes; on a 10 Mbps connection it can take over an hour.

Mac Model and Chip

Apple Silicon Macs (M1, M2, M3, M4) install updates noticeably faster than older Intel Macs. Newer SSDs write data much faster than older Fusion Drives or spinning hard disks.

Available Storage

Updates need free space (often 20–35 GB for a major upgrade). A nearly full drive slows things down or stalls the update.

Server Load on Launch Day

When a major new macOS version is released, Apple's servers are flooded, which can dramatically slow downloads for the first day or two.

How to Make macOS Updates Faster

• Update overnight or during off-peak hours to avoid server congestion
• Free up disk space — aim for at least 20–35 GB free before a major upgrade
• Use a wired Ethernet connection or strong Wi-Fi for the download
• Plug in your laptop — updates won't run on low battery
• Wait a few days after a major release if you don't need the update immediately, to avoid launch-day server crowds
• Back up first with Time Machine so you're protected if something goes wrong

If the Update Seems Stuck

A progress bar that appears frozen — especially during the 'preparing' or 'less than a minute remaining' phase — is usually still working. Wait at least 1–2 hours before assuming a real problem. If it's genuinely stuck, you can force a restart and boot into macOS Recovery. Never interrupt an update that is actively writing to the drive unless you're certain it has failed.

Bottom Line

Plan for about an hour for a major macOS upgrade and 15–30 minutes for routine updates. Back up first, keep the Mac plugged in, and be patient during the 'preparing' phase.