How to Fix iTunes Error 3259 When Connecting iPhone

By ErrorFix · Updated October 25, 2026 · 7 min read

What error 3259 means

Error 3259 shows up in iTunes on Windows or Finder on a Mac when you are downloading content, updating iOS, or restoring an iPhone. The message usually reads that the iPhone could not be restored or the download could not be completed because of an unknown error, and the number 3259 tells you the real story: the connection to Apple’s servers timed out.

A timeout is different from a flat refusal. Your computer reached out, but the reply never came back in time — or the reply was blocked somewhere along the way. That points to the path between your computer and Apple, not to the iPhone. Common break points include a shaky Wi-Fi signal, a router that drops long connections, a firewall or antivirus tool that quietly blocks iTunes, a computer clock set to the wrong date, or a hosts file that still carries old entries redirecting Apple’s servers elsewhere.

The reassuring part is that error 3259 does not damage your iPhone and does not touch your data. The phone is simply waiting for a download or restore that never completed. Work through the steps below in order — they move from the most common causes to the rarer ones — and most people clear the error in under half an hour.

Common causes

• Unstable internet connection: weak Wi-Fi, a struggling router, or a connection that drops during long downloads.
• Wrong date, time, or time zone: iTunes verifies the computer’s clock against Apple’s servers, and a wrong clock breaks that check.
• Firewall or antivirus blocking iTunes: security software can silently block the traffic iTunes needs to reach Apple.
• Outdated iTunes or operating system: old software with stale certificates or network code that mishandles the connection.
• Hosts file entries blocking Apple: leftover entries from old tools that redirect or block Apple’s servers.

How to fix error 3259 — step by step

Work through these in order. The network, clock, and firewall steps solve the large majority of error 3259 cases, so check them before assuming the problem is deeper.

1. Check your internet connection. Error 3259 is a timeout, so start with the network itself. Open a browser and load a few sites to confirm you are actually online. If pages are slow or failing, restart your router — unplug it for 30 seconds, plug it back in, and wait for it to come fully online. If you are on Wi-Fi, move closer to the router or switch to a wired Ethernet connection, which is far more stable for a long download or restore. Then try iTunes again.
2. Fix the computer's date, time, and time zone. iTunes checks the computer's clock when it talks to Apple's servers, and a wrong date or time can make the connection fail outright. On Windows, open Settings, go to Time and language, then Date and time, and turn on Set time automatically and Set time zone automatically. On a Mac, open System Settings, go to General, then Date and Time, and turn on Set time and date automatically. Restart the computer afterward, then retry.
3. Update iTunes or Finder and the operating system. An old iTunes version can mishandle the connection to Apple's servers, and an outdated OS can have stale certificates or network code. On Windows, open the Microsoft Store, go to Library, and update the Apple Music and Apple Devices apps (in classic iTunes, go to Help and choose Check for Updates). On a Mac, open System Settings, go to General, and choose Software Update. Install everything available, restart, and try again.
4. Let iTunes through the firewall and security software. Firewalls and antivirus tools are one of the most common causes of error 3259 because they can block iTunes from reaching Apple's servers. On Windows, open Settings, go to Privacy and security, then Windows Security, then Firewall and network protection, and choose Allow an app through firewall — make sure iTunes (or Apple Mobile Device Service) is allowed on private and public networks. If the problem persists, temporarily disable your antivirus and firewall for one test attempt, then turn them back on right away whether it worked or not.
5. Check the hosts file for blocked Apple servers. The hosts file can redirect or block connections to Apple's servers, often left over from old jailbreaking or downgrade tools. On Windows, open Notepad as administrator and open C:/Windows/System32/drivers/etc/hosts; on a Mac, open Terminal and run sudo nano /etc/hosts. Look for any lines mentioning apple.com or gs.apple.com and delete them (or add a # at the start of each line to comment them out). Save the file, restart the computer, and retry.
6. Try a different network or computer. If error 3259 only happens on your home network, the problem is the network, not the iPhone — a router setting, a parental control, or an ISP filter may be interfering. Connect the computer to a phone hotspot or a different Wi-Fi network and try again. If it still fails, try a different computer with a fresh iTunes or Finder install. If it works there, the original computer's network settings, security software, or hosts file are the culprit.

Did this fix it? Quick checklist

• Internet connection stable, ideally wired, with the router restarted
• Computer date, time, and time zone set automatically and the computer restarted
• iTunes or Finder and the operating system fully updated
• iTunes allowed through the firewall, security software back on after testing
• Hosts file clean of Apple entries, and the download or restore completes without error 3259

If error 3259 survives a stable network, a correct clock, updated software, open firewall rules, a clean hosts file, and a different computer, the fault may sit with your internet provider or with Apple’s servers at that moment. Wait an hour and try again, and if it still fails, contact Apple Support and mention the exact error code — it points them straight to the connection-timeout diagnosis.