How to Fix iPhone "Preparing Update" Error [Working Methods]

Quick Answer: If your iPhone is stuck on “Preparing Update” for more than 15–20 minutes, the update process has stalled. This is caused by low storage space, a corrupted update file, a weak internet connection, or an Apple server issue. You do not need to factory reset your phone — follow the fixes below in order and it will resolve in most cases within minutes.

You may see any of these on your screen:

Preparing Update — stuck for hours
iPhone stuck on Preparing Update screen
iOS update stuck on Preparing Update
Preparing Update not moving
iPhone frozen on Preparing Update
Update stuck before downloading
iOS 17 / iOS 18 Preparing Update stuck

How Long Should Preparing Update Take?
What Causes This Error?
Troubleshooting Decision Tree
All Fix Methods — Step by Step
Similar iOS Update Errors Explained
Frequently Asked Questions
Official Apple Resources

How Long Should “Preparing Update” Actually Take?

This is the most common question — and the answer surprises most people.

Update Size	Normal Time	When to Worry
Minor update (100–500 MB)	2–5 minutes	After 15 minutes
Major iOS update (3–6 GB)	5–15 minutes	After 30 minutes
Full iOS version upgrade	10–20 minutes	After 45 minutes

If your phone has been sitting on this screen beyond these times with no progress bar movement, it is stuck — not just slow. Proceed with the fixes below.

What Causes iPhone to Get Stuck on “Preparing Update”?

During the Preparing Update stage, iOS is doing three things simultaneously: verifying the downloaded update file, checking available storage space, and confirming the update with Apple’s servers. If any one of these fails, the process freezes silently — with no error message shown.

Cause	How Common	Who It Affects	Difficulty to Fix
Not enough free storage space	~40% of cases	Any user	Easy
Corrupted or incomplete update file	~25% of cases	Any user	Easy
Weak or dropped WiFi during preparation	~20% of cases	Any user	Easy
Apple update server overload (major release day)	~10% of cases	Any user on launch day	Easy — wait it out
iOS software bug or profile conflict	~5% of cases	Developer/beta users	Medium

Troubleshooting Decision Tree

Follow this before jumping to fixes:

Has it been less than 20 minutes?
- YES → Wait. Do not interrupt the process yet.
- NO → Continue below.
Is your iPhone storage almost full (less than 3 GB free)?
- YES → Go to Fix 2 first — free up storage before anything else.
- NO → Continue below.
Did this start happening on a major iOS release day (like iOS 17 or iOS 18 launch)?
- YES → Apple servers are likely overloaded. Wait 2–3 hours and retry.
- NO → Continue below.
Is the progress bar completely frozen with no movement at all?
- YES → Go to Fix 1 — force restart first.
- NO → Keep waiting up to 45 minutes total.
Did force restart not help?
- YES → Go to Fix 3 — delete and re-download the update file.

All Fix Methods — Step by Step

Fix 1 — Force Restart Your iPhone

A force restart clears the stuck process from memory without deleting any data. This is always the first thing to try — it resolves the issue in roughly 40% of cases.

iPhone 8 and later (including all iPhone X, 11, 12, 13, 14, 15, 16):

Press and quickly release the Volume Up button.
Press and quickly release the Volume Down button.
Press and hold the Side button until the Apple logo appears.
Release and let the phone restart normally.

iPhone 7 and 7 Plus:

Press and hold Volume Down and the Sleep/Wake button simultaneously.
Hold until the Apple logo appears, then release.

iPhone 6s and earlier:

Press and hold the Home button and the Sleep/Wake button together.
Hold until the Apple logo appears, then release.

After restart, go to Settings → General → Software Update and check if the update shows as ready to install or needs to be re-downloaded.

Fix 2 — Free Up Storage Space

iOS requires significantly more free space than just the update file size. It needs working space to unpack and install the update. Apple recommends having at least 2x the update file size free — for a 4 GB iOS update, you need roughly 8 GB free.

Go to Settings → General → iPhone Storage.
Check how much space is available at the top of the screen.
If you have less than 5 GB free, delete content to create space. The storage screen shows recommendations — tap Enable iCloud Photos or Offload Unused Apps for quick wins.
Manually delete large apps, videos, or podcasts you no longer need.
After freeing space, return to Settings → General → Software Update and retry.

Quick storage tips:

Go to Settings → General → iPhone Storage → scroll down to find large apps taking up hidden space
Delete and reinstall apps like Spotify, Netflix, or games — these accumulate large offline caches
Move photos to iCloud or your computer before the update

Fix 3 — Delete the Update File and Re-Download

If the downloaded update file is corrupted or incomplete, re-preparing it will keep failing no matter what. Deleting it forces iOS to download a clean copy.

Go to Settings → General → iPhone Storage.
Scroll through the app list and find the iOS update file — it will appear as something like “iOS 18” or “iOS 17.6.1” with a size of several gigabytes.
Tap on it and select Delete Update.
Confirm the deletion.
Go to Settings → General → Software Update.
Download the update again — preferably on a strong, stable WiFi connection.

Important: Do not start the download on mobile data. The update files are several gigabytes and a dropped connection mid-download will corrupt the file again.

Fix 4 — Check Your WiFi Connection

The Preparing Update stage still communicates with Apple’s servers to verify the update. A weak or unstable connection can stall this verification silently.

Move closer to your WiFi router.
On your router, restart it by unplugging for 30 seconds and plugging back in.
If possible, connect to a different WiFi network entirely — a friend’s hotspot or a different home network — and retry the update.
Avoid starting an update on public WiFi. These networks are often throttled and block large file operations.
On your iPhone, go to Settings → WiFi, tap the network name, and tap Forget This Network. Reconnect with the password and retry the update.

Fix 5 — Update via iTunes or Finder (Computer Method)

Updating through a computer completely bypasses the on-device preparation process. The computer handles all the downloading and preparation, then pushes the finished update directly to your phone. This is the most reliable method if all on-device attempts have failed.

On a Mac (macOS Catalina or later), open Finder. On Windows or older Mac, open iTunes — ensure it is the latest version.
Connect your iPhone to the computer using an Apple-certified cable.
If prompted, tap Trust This Computer on your iPhone and enter your passcode.
In Finder or iTunes, select your iPhone from the sidebar.
Click Check for Update.
Click Download and Update. Do not disconnect during this process.

The computer will download the full IPSW update file (3–7 GB), prepare it, and install it directly. This method is significantly more stable than over-the-air updates and avoids the Preparing Update stall entirely.

Fix 6 — Check Apple’s Server Status

On major iOS release days — when millions of people update simultaneously — Apple’s update servers become overloaded. The Preparing Update stage contacts these servers for verification, and a slow or unresponsive server will cause it to stall.

On a different device, visit apple.com/support/systemstatus.
Look for iOS Device Activation and Software Update in the list.
If either shows yellow (degraded) or red (outage), wait 2–4 hours and retry.
Major iOS releases (like the annual September release) typically see server congestion for 12–24 hours after launch. Waiting until the next morning usually resolves it entirely.

Fix 7 — Remove Beta Profile (Developer and Beta Users Only)

If you enrolled in Apple’s beta program at any point, a leftover beta profile can interfere with stable iOS updates and cause the Preparing Update stage to fail.

Go to Settings → General → VPN & Device Management.
Look for any profile labeled iOS Beta Software Profile or similar.
Tap on it and select Remove Profile. Enter your passcode if prompted.
Restart your iPhone.
Go to Settings → General → Software Update and retry the update.

Similar iOS Update Errors — What Is the Difference?

Error	When It Appears	Main Cause	Fix
Preparing Update — stuck	Before installation starts	Storage, corrupted file, server	Fixes 1–6 in this guide
Update Requested — stuck	Before download begins	Apple server congestion	Wait, then retry on different WiFi
Verifying Update — stuck	After download, before install	Server verification timeout	Delete update file and re-download
Update Failed — Unable to Verify	After preparation	No internet during verification	Reconnect to WiFi and retry
iPhone stuck on Apple logo after update	During installation	Corrupted install or low storage	DFU restore via Finder/iTunes
Not Enough Space to Update	Before download	Insufficient free storage	Free up storage — Fix 2 above

Frequently Asked Questions

How long does Preparing Update take on iPhone?

For minor updates, Preparing Update normally takes 2–5 minutes. For major iOS version upgrades (like iOS 17 or iOS 18), it can take up to 15–20 minutes. If it has not moved in over 30 minutes, it is stuck and you should begin troubleshooting.

Is it safe to force restart iPhone during Preparing Update?

Yes. The Preparing Update stage happens before any installation begins. Your current iOS is untouched at this point. A force restart during Preparing Update will not corrupt your phone or leave it in a broken state — it simply cancels the preparation and lets you start fresh.

Why does my iPhone keep getting stuck on Preparing Update?

If it happens repeatedly, the most common culprit is not enough free storage space, or a persistently corrupted update file. Delete the update file from Settings → General → iPhone Storage, free up at least 6–8 GB of space, and re-download. If it keeps failing after that, update through a computer using Finder or iTunes instead.

Can I update iPhone without WiFi if it is stuck?

You can update via mobile data, but it is not recommended for large iOS updates — carrier throttling and unstable connections will likely corrupt the file again. If WiFi is the problem, use a mobile hotspot from another device instead. The update via Finder or iTunes method (Fix 5) also bypasses the iPhone’s WiFi entirely.

Does Preparing Update delete anything on my iPhone?

No. Preparing Update does not touch your data, apps, or settings. Nothing is deleted or changed at this stage — the phone is only preparing the update file in a temporary partition. Your data remains completely safe even if you cancel or restart during this phase.

My iPhone shows Preparing Update overnight and still is not done — what do I do?

If it has been several hours, the process is definitely stuck. Force restart your iPhone (Fix 1), then delete the update file (Fix 3), free up storage (Fix 2), and re-download. If over-the-air updates keep failing, plug into a computer and update through Finder or iTunes — this is the most reliable resolution for persistent cases.

Will updating via iTunes lose my data?

No. Updating (not restoring) via Finder or iTunes preserves all your data, apps, and settings. The difference is important — choose Update not Restore when prompted. A restore erases the device. An update installs the new iOS over the existing one.

Why does Preparing Update take so long on iOS 18?

iOS 18 is a large update — the full installation package is over 5 GB. On older iPhones with slower processors (iPhone XR, XS era), the preparation and verification process takes longer. If your phone is several years old and the progress seems very slow, it may just need more time rather than being truly stuck. Give it 45 minutes before taking action.

Official Apple Resources

Apple System Status — Check if iOS update servers are running normally
Apple Support — Update iPhone — Official iOS update guide
Apple — Update iOS via iTunes or Finder — How to update using a computer
Apple — If you can’t update or restore iPhone — Official troubleshooting for update failures
Apple — Free up storage on iPhone — How to create space before updating

Still stuck? If you have tried every fix above and the update still will not complete, contact Apple Support or visit an Apple Store. Bring your proof of purchase. In rare cases a hardware diagnostics check can identify if an older device has a storage component issue that prevents updates from completing.

Stephen Giffin

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How to Fix iPhone “Preparing Update” Error [Working Methods]

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