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(Similar to Why do my Macbook Pro's WiFi speeds drop significantly when paired with Bluetooth devices?, MacBook Pro WiFi doesn't work when Bluetooth is on, and https://discussions.apple.com/thread/8028129)

On my MacBook Pro running 10.12.6, whenever my Bluetooth Apple Magic Mouse is connected, the WiFi is practically useless. Speeds drop to less than 1 kbps, sometimes no connection at all.

I've searched and tried every solution I could find:

  1. Removing the "Bluetooth PAN" network interface.
  2. Using 5 GHz and 2.4 GHz WiFi networks.
  3. Deleting config files from /Library/Preferences/SystemConfiguration/
  4. Resetting PRAM/NVRAM and SMC
  5. Setting a new network location with custom MTU and DNS

Nothing fixed the issue. The instant I turn off Bluetooth, my WiFi is back to normal.

Apple suggested upgrading to 10.13 but I don't really want to do that.

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  • Which MacBook Pro? See this relevant post: apple.stackexchange.com/questions/119767/… Also, is there a reason you don't want to implement the recommended fix? – Allan Apr 16 '18 at 17:00
  • It's a MacBookPro11,3. (I don't want to upgrade to 10.13 because I use Adobe Premiere heavily and there have been issues.) That post you mention; are you suggesting it's a hardware issue? Apple designed a Bluetooth mouse that would interfere with its own WiFi card? And why wasn't it an issue with 10.11? – Dan Apr 16 '18 at 21:18
  • No, in that post I state that it's a driver issue. See the last paragraph. – Allan Apr 16 '18 at 21:22
  • Oh, I see ... and is there anything I can do about it? – Dan Apr 17 '18 at 21:20
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    You have two options: 1) Get a wired USB mouse. 2) Update macOS. – Allan Apr 17 '18 at 21:23

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