Mac Error 102 — Network Connection Broken During Download

Overview

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.

Key Details

• 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

Common Causes

• 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

Steps

1. 1Retry the download — most temporary network issues resolve on retry
2. 2Switch to a wired Ethernet connection for large, important downloads
3. 3Disable automatic network switching: System Settings > Wi-Fi > disable auto-join on secondary networks
4. 4Clear Safari cache: Safari > Settings > Privacy > Manage Website Data > Remove All
5. 5Use curl or wget in Terminal for more reliable large file downloads with resume support

Tags

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Frequently Asked Questions