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Magic Mouse and Keyboard laggy and Unresponsive after Big Sur
- Thread starter Joelcarlos
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I have a perhaps similar problem, running the same build on a MBP 13 2019 and without fail, if my computer goes to sleep, my mouse and keyboard disconnect from bluetooth and only a restart will get them connected again. Shame really, as the previous beta did not have this problem for me. Haven't seen it mentioned elsewhere, but could be related, and hope it is fixed up in the next beta and that is released quickly 
I think I'm having something similar - late 2014 imac here, and have had ZERo issue on the beta (same one as you) but as of tonight, my magic keyboard and magic mouse keep disconnecting "Connection Lost" and reconnecting.. Randomly, and over and over.
I've tried resetting the bluetooth settings, disconnecting the devices, readding them, nothing. I keep getting the same response.
I've tried resetting the bluetooth settings, disconnecting the devices, readding them, nothing. I keep getting the same response.
Hi all, similar problems here with my MX anywhere 2 on my MBP 13 2015, Logitech K380 seems fine though.
I've enrolled in the beta program, mouse and keyboard issue for me has been resolved in 11.2
For me this still happens once in a while. Usually when I have connected 3 Bluetooth input devices, in my case my Keychron K2 Keyboard + Magic Mouse + Magic Trackpad. When starts I usually turn off the trackpad and the stuttery stops immediately, which is not ideal.
Updated from Mojave to Big Sur a couple of weeks ago, figured the coast was clear (so to speak). But no, I've run into this bug as well (Magic Keyboard and Magic Mouse on a 2017 27" iMac). As mappyuk noted, seems to happen after waking the iMac. Another weird side effect is that the diacritical mark popup often appears when trying to type in this situation. I've reported this collection of problems to Apple as a bug.
I just resolved the problem by consecutively:
1. Resetting the SMC. (disconnect the power cable from the back of the iMac, wait 15 sec., connect again and restart.
2. Zapped the NV PRAM (cmd-opt-P-R and I let it chime 3 times). After restart:
3. opt-shift >Bluetooth menubar> Reset Bluetooth module. (still nothing)
4. opt-shift >Bluetooth menubar> Factory reset all connected Apple devices. (this caused the trackpad to be unresponsive, so I had to hook up a wired mouse and:
5. Deleted the Bluetooth prefs in the User Library Preferences.
Then I restarted (still using the wired mouse) and the Bluetooth setup window appeared.
The Trackpad showed up and asked to connect.
Trackpad connected, and no lag anymore in the keyboard or Trackpad.
Any of you still having this problem (which I did), make sure you aren't keeping USB3 external drives around the back hinge of your laptops or desktops. I was confounded trying to figure out what was causing a jumpy mouse and keyboard, and found a note on Apple's tech docs that states:
I moved my plugged in Time Machine WD hard drive to the other side of the computer and the mouse instantly went back to normal.
Now, if I could only put the hair back in that was pulled out trying to solve this riddle, I'd be in business.
I moved my plugged in Time Machine WD hard drive to the other side of the computer and the mouse instantly went back to normal.
Now, if I could only put the hair back in that was pulled out trying to solve this riddle, I'd be in business.
