Mac Error 102 — Network Connection Broken During Download

Mac error 102 occurs when a network connection is broken during a download or data transfer, often in Safari, App Store, or system update operations. This guide covers everything you need to know about this topic, including common causes, step-by-step solutions, and answers to frequently asked questions.

Here are the key things to understand: Error 102 indicates an established network connection was interrupted during data transfer. Common with Safari downloads, macOS software updates, and App Store downloads. Can be caused by the server ending the connection or local network interruption. Wi-Fi switching between access points can trigger this during large downloads. Proxy servers with timeout settings may cut connections for slow downloads. Understanding these fundamentals will help you diagnose and resolve this issue more effectively.

The most common reasons this occurs include: Server closed the connection before download completed. Wi-Fi network instability or automatic network switching. Proxy or firewall timeout on long-running downloads. ISP connection dropped momentarily during transfer. DNS resolution failure during redirect in the download chain. Identifying the root cause is the first step toward finding the right solution.

To resolve this, follow these recommended steps: Retry the download — most temporary network issues resolve on retry. Switch to a wired Ethernet connection for large, important downloads. Disable automatic network switching: System Settings > Wi-Fi > disable auto-join on secondary networks. Clear Safari cache: Safari > Settings > Privacy > Manage Website Data > Remove All. Use curl or wget in Terminal for more reliable large file downloads with resume support. If these steps do not resolve the issue, consider consulting additional resources or a qualified professional.

This article is part of our Mac Error Codes collection on Error Codes Wiki. We provide comprehensive, up-to-date information to help you find solutions quickly.