Macbook Pro M1 Slow WiFi

M1 Max 16" 2021

WiFi connects to network, but can't sustain high speeds

Other devices on the same network and in the same physical location can easily reach 500-800 Mbps with any of the standard speed test sites. Over ethernet, even faster.


My new (< 1 month old) MBP has never been able to hit these speeds, and is typically in the 20-30 Mbps range max, and sometimes can't even maintain a connection.


Confirmed this in Apple Store (only getting 9 Mbps on their 100 Mbps network, as verified by Genius)

Sent in for repair, they replaced antenna module and said problem was fixed. IT WAS NOT.


Sent it back in for repair, now they say they can't reproduce the problem. Still have no working MBP and no resolution in sight.


This computer is junk, but because I didn't realize there was a WiFi problem until 15 days after purchase, I can't exchange it for a new one, and Apple Care does not sound interested in fixing it.


Any ideas?

Anyone else with similar issues?

Posted on Sep 5, 2022 3:57 PM

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6 replies

Sep 5, 2022 4:38 PM in response to johnsock

Wi-Fi slow — current accommodations include:


• Updating to the very latest version of Monterey.


• Checking the [√] ask to Join new networks check box:

AND purging the list of potentially-available networks in this pane:

System preferences > Network > Wi-Fi > (Advanced) ...

... to leave ONLY the networks you might really join:


>> all of these reduce the number of networks your Mac is evaluating on a moment-by moment basis, looking for a better connection.


• set IPv6 to link-local only, instead of on or off.


If you continue to have trouble after using these steps, create a new named Network "Location" -- a collection of settings applied "all at once" when you select it. Every new named "Location" you create starts with all defaults, which lets you walk away from any bogus settings that might be causing you trouble:


How to use network locations on your Mac - Apple Support

How to use network locations on your Mac - Apple Support

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Sep 5, 2022 4:38 PM in response to Grant Bennet-Alder

Poisoning Internet performance:.


By far the easiest way to ruin performance is to install ANY third-party speeder-uppers, Cleaners, Optimizers,Virus scanners or a VPN you installed yourself.


Next up is Non Apple-native File sync-ers. (Stay with me on this one.) Dropbox, Microsoft Onedrive, Google drive and others are in this category. Since they were ported from that other OS environment, they IGNORE the Mac File System Event Store (that could tell them EXACTLY what folders have changed recently) and instead do a a Brute-force read of all your files, and all the files stored on their drive on the Internet. This punishes the ability to get any data (including speed test data) through their enormous and frivolous file reading and re-reading.


Backup-to-the-Web Utilities are also in this category. Your backup should be on a local drive, not on the web. If you question this, just ask.


Last up is Apple Sync-ers, such as sync-ing your iPhotos Library to iCloud. A substantial iPhotos library can take many, many hours to bring up-to-date, but at least Apple is smart enough that only the changes must then be brought up to date again.


Sep 5, 2022 4:55 PM in response to Grant Bennet-Alder

Thanks, but not helpful. All testing was performed on a clean install of the latest version of MacOS with no additional software installed and no other networks.

If you have to do any of these suggested things to get your network working properly then there is something else wrong. My problem is not the inability to connect to the network, it is a problem of being able to sustain high speed data transfers once connected.

Sep 5, 2022 5:12 PM in response to Grant Bennet-Alder

Sorry, I can't get one now. Apple still has my computer. I did check that before taking it in the first time and it was always connecting 802.11ax PHY Mode, but the Tx Rate was always very low, like in the 100 Mbps range.

For comparison, the computer I'm using now, on the same network and same location where I tested the faulty MBP, gets a Tx Rate of 780 Mbps (802.11ac).

Something else I noted on the faulty MBP, the networkQuality tool (MacOS terminal built-in) would routinely fail because it could not reliably transfer data and make it through a complete test. When connected with ethernet, everything worked perfectly.

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Macbook Pro M1 Slow WiFi

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