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I bought a new 2018 MacBook Pro with Touch Bar. I am experiencing Bluetooth issues such as my Magic Mouse disconnecting randomly and lagging. These are the steps I have taken (not in the order as listed here) though I am still experiencing the dropouts. Any other suggestions?

[Edit: I have had my Bluetooth antenna in my MacBook replaced and it is somewhat better, though, still not fully solved]

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    This is excellent debugging. Only one thing I see missing: Have you tried a different mouse? Do you experience this with any other Bluetooth devices? – Unassuming Guy Oct 22 '18 at 21:34
  • Have the same issue. Have also reset the bluetooth connections and devices (Shift+Option+Bluetooth -> Debug -> Reset Bluetooth Modules & Factory Reset Connected Devices). The mouse worked and works perfectly on my prior MacBook Pro 2013 (High Sierra) but lags and disconnects/reconnects frequently (5-10 minutes) while not being used (while I'm typing). – Clint Oct 23 '18 at 7:29
  • I've just brought home a Magic Mouse 2 from work and I am testing it right now. Good suggestion. I will let you know how it goes! – Jo- Oct 23 '18 at 21:52
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    I have been having the same problems with my 2018 MacBook Pro- I completed all the same steps as the OP, Apple could not solve the problem so they gave me a new MBP, but the same problem has persisted. I have also tried multiple Magic Mouses, generation 1, generation 2 and other brands- all have the same issue. I have also read that turning off "Handoff" could correct the problem, but that has not worked for me yet. – Mike Oct 26 '18 at 16:35
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    I've managed to get rid of the problems after an operating system reinstall. My initial OS was restored from a Backup of my previous laptop. Seems like it did not like that. Now it is all good – Matei Suica Nov 29 '18 at 12:39
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Updating Xcode has limited the disconnects from the keyboard and Magic Mouse (still not perfect but much better).

To update Xcode, open your Terminal and enter xcode-select --install. You may have to delete the old version of Xcode before installing the latest Xcode. Make sure to also install the command line developer tools.

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  • On my Macbook Pro 2019 I had suddenly the same behaviour with a Dell Bluetooth mouse. So I bought a Magic Mouse 2 but the disconnects persisted. I spent days in trying all of the Voodoo like described in this question Finally I sent the Macbook back to Apple and they fixed it. They told me that they just updatet the firmware of the wlan module. – marsh-wiggle Aug 7 '20 at 6:07

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