macOS Ventura系统下iMac以太网接口消失的恢复方法咨询

Hey there, sorry to hear your Ethernet interface went missing on your iMac running macOS Ventura—let’s go through some practical troubleshooting steps that have helped others with similar T2 Controller-related network issues:

• 重置SMC（系统管理控制器）
  Since your iMac uses the Apple T2 chip, resetting the SMC often fixes wonky hardware-related glitches like missing network interfaces. Here’s how: shut down your iMac, hold the power button for 10 seconds, release it, wait a few seconds, then turn it back on. This resets low-level hardware settings that might be causing the Ethernet to hide.

• 检查并重新配置Thunderbolt Bridge
  You mentioned seeing a "Thunderbolt bridge" marked as Ethernet type in System Report. Head over to System Settings > Network, click the + button at the bottom left. From the "Interface" dropdown, select "Thunderbolt Bridge" and click "Create". Sometimes setting this up can trigger the system to recognize the native Ethernet interface, or you might even be able to use the Thunderbolt Bridge as an Ethernet alternative temporarily.

• 删除损坏的网络偏好设置文件
  Corrupted system config files are a common culprit for missing interfaces. Here’s how to fix that:

  1. Open Finder, press Command+Shift+G, then paste /Library/Preferences/SystemConfiguration/ and hit enter.
  2. Locate and delete these files: com.apple.network.effectiveconfiguration.plist, com.apple.network.identification.plist, and NetworkInterfaces.plist.
  3. Restart your iMac—your system will automatically rebuild these files from scratch. After rebooting, check the Network settings again to see if Ethernet is back.

• 用终端检查并激活接口
  Open Terminal and run networksetup -listallhardwareports to see if your Ethernet port is listed here (even if it’s not showing in System Settings). If you spot it, try manually configuring it with a command like:

  networksetup -setmanual "Ethernet" 192.168.1.100 255.255.255.0 192.168.1.1
  

  Just replace the IP address, subnet mask, and router address with values that match your home network. This might force the interface to become active again.

If none of these steps bring back your Ethernet interface, it might be a deeper hardware-related issue with the T2 controller. In that case, reaching out to Apple Support or visiting an Apple Store for diagnostics would be the next best move.

备注：内容来源于stack exchange，提问作者delphirules