MacBook Pro M3 Wifi disconnects frequently

Since the issue has persisted across macOS 26 and 27.2, while your other Apple devices work without problems, let's focus on identifying whether this is related to macOS, third-party software, or the Mac's Wi-Fi hardware.

Please try the following troubleshooting steps:

Refresh your Wi-Fi connection

• Restart your Mac and Wi-Fi router.
• Go to System Settings > Wi-Fi > Details next to your network.
• Select Forget This Network, then reconnect.

Apple's instructions: Reset or remove Wi-Fi network settings on Mac.

Check network settings

• Open your Wi-Fi network's Details and temporarily disable Low Data Mode, if enabled.
• If you're using a VPN or third-party security software, temporarily disable it and test your connection.

Low Data Mode reduces data usage and background network activity. It is not a known direct cause of Wi-Fi disconnections, but disabling it temporarily can help rule it out.

Apple references:

Wi-Fi settings on Mac

Check VPN and third-party security software

Test another Wi-Fi network

Connect your MacBook Pro to another Wi-Fi network, such as a mobile hotspot, and observe whether the connection remains stable.

This helps determine whether the issue is specific to your Mac or potentially related to your current router.

If necessary, you can also review Apple's Recommended settings for Wi-Fi routers and access points.

Run Wireless Diagnostics as already suggested 👍

macOS includes a built-in utility to help identify wireless connectivity problems

• Hold the Option key and click the Wi-Fi icon in the menu bar.
• Select Open Wireless Diagnostics.
• Follow the on-screen instructions.

The utility analyses your wireless connection and generates a diagnostic report that can help with further investigation. It does not automatically repair connectivity issues or change your network settings.

Apple's instructions: Use Wireless Diagnostics on your Mac.

Test in Safe Mode

Safe Mode helps determine whether third-party software or other software loaded during normal startup may be contributing to the problem.

1. For your M3 MacBook Pro:
2. Shut down your Mac.
3. Press and hold the power button until startup options appear.
4. Select your startup disk.
5. Hold the Shift key and click Continue in Safe Mode.
6. Connect to Wi-Fi and monitor the connection.

What does this test tell us?

• If Wi-Fi works normally in Safe Mode, third-party software, extensions, or login items may be contributing to the issue.
• If Wi-Fi continues to disconnect, macOS, network configuration, router compatibility, or potentially hardware may require further investigation.

Safe Mode is a diagnostic environment, not a repair utility. It does not automatically fix Wi-Fi problems, remove problematic applications, reset network settings, or repair hardware. Restart your Mac normally when finished.

Apple's instructions: Start up your Mac in safe mode.

A few questions

To help narrow things down, could you let us know:

• Does the Wi-Fi icon show a disconnection, or does Wi-Fi remain connected without internet access?
• Does your network disappear from the available networks list when the problem occurs?
• Does the issue also happen on another Wi-Fi network?
• Does Wi-Fi remain stable when testing in Safe Mode?

Your answers and the results of these tests will help us identify the likely cause and determine the next appropriate steps.

Wi-Fi Radio Signals from your Router fall off as the inverse square of the distance. Provided you are close to your Router and have clear line of sight and no competition from neighbors' Routers or known interference producers like microwave ovens, you should not be having issues.

All others need to do a more careful analysis to find out what is happening.

Wireless diagnostics:

Hold down the Option key while you click on the Wi-Fi icon on the menubar to open up the tools for investigating and fixing Wi-Fi issues

Choose "Open Wireless diagnostics", which opens the wireless diagnostics Assistant, but does not proceed.

NB> Wireless Diagnostics is an App that puts up its own MenuBar.

Using its Window menu, there are about eight different things you can do from here,

Assistant (default window)

Info

Logs

Scan

Performance

Sniffer

Sidecar

Diagnostics

The top-level is to choose Diagnostics off the Window menu, or simply click (Continue) to do a quick check for Gross misconfiguration or operating problems. Your Admin password will be required. If any recommendations are shown, you should consider then seriously.

Next is to hold down the Option key and click the Wi-Fi icon as before. The screen that opens shows operating parameters of your Wi-Fi network. There is a great deal of valuable information in those numbers.

Readers are eager to interpret what is going on from the values there. Screenshot, transcribe, or photograph the results and post back in a reply on the forums. Looks like this older one.