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Bugs Killed

Mac

My new MacBook will not join the office Wi-Fi network

Some M5 MacBook Air and M5 Pro or M5 Max MacBook Pro models can fail to join office 802.1X Wi-Fi when content filter extensions are in use. Apple resolved this issue in macOS Tahoe 26.4.1.

Affects

Versions

  • macOS Tahoe 26

Apps

  • Content filter extensions

Hardware

  • MacBook Air with M5
  • MacBook Pro with M5 Pro or M5 Max

What you see

  • The MacBook fails to join an 802.1X Wi-Fi network
  • The failure occurs while content filter extensions are in use
  • The affected Mac is a MacBook Air with M5 or a MacBook Pro with M5 Pro or M5 Max

Why it happens

Confirmed A macOS Tahoe issue prevented the affected M5 MacBook models from joining 802.1X Wi-Fi networks while content filter extensions were in use. [1] [2]

When it shows up

The Mac is an affected M5 MacBook, the office uses an 802.1X Wi-Fi network, and content filter extensions are in use.

You are in this case if:

  • The Mac is a MacBook Air with M5 or a MacBook Pro with M5 Pro or M5 Max
  • The network uses 802.1X authentication
  • Content filter extensions are in use
  • The Mac is not yet running macOS Tahoe 26.4.1

1 fix below

The steps that killed it

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Keeping it away

  • Install recommended macOS updates that improve device stability, performance, or compatibility.

Sources

  1. What's new for enterprise in macOS Tahoe 26
    Apple Support
  2. Apple's macOS 26.4.1 Update Fixes a Frustrating Wi-Fi Problem on New M5 MacBooks
    techloy.com

Vendor status fixed · Fixed in macOS Tahoe 26.4.1 · Last verified 2026-09-19