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Security Software Issues Medium Severity
Error 1611: Security Software/USB Issue
This error can be caused by third-party security software interfering with the connection or by USB connection issues.
Before You Begin
- • On Mac with macOS Catalina 10.15 or later: Ensure your Mac is up to date
- • On Mac with macOS Mojave 10.14 or earlier: Ensure you have the latest version of iTunes
- • On PC: Ensure you have the latest version of iTunes or the Apple Devices app
Common Causes
- 1 Antivirus software blocking the connection
- 2 Firewall preventing communication
- 3 Faulty or non-certified USB cable
- 4 USB port issues on computer
How to Fix Error 1611
1
Check Security Software
Check your third-party security software and ensure it's not blocking the connection to Apple servers.
2
Temporarily Disable Firewall
Temporarily disable firewall or antivirus software to test if it's causing the issue.
3
Check USB Connection
Check your USB connection and try a different cable or port.
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Still Need Help?
If you've tried all the steps above and still can't resolve the issue, you may need to contact Apple Support or visit an Apple Store. You can also compare your case against Apple's official iOS update and restore errors page.