Bluetooth Magic Mouse lag / stutter .. , Apple Keyboard lag / stutter

That didn't worked; I had to open my macbook ( from 2011 ) following this instructions:

Resetting the System Management Controller (SMC) on your Mac - Apple Support

this should do the trick; I've tried everything and this was the thing that worked to me

Disabling handoff has also - so far - resolved my issue.

Update: my trackpad lag/stutter has not returned since turning off Handoff on my Mac 2 days ago. I'll keep updating every few days.

Disabling handoff is working for me so far as well.

Haven't had the problem return in the four days since I disabled Handoff. Also, haven't missed having handoff.

6 days now, and the problem has not returned. It feels like turning off Handoff has resolved the track pad issue for me.

So this still turns up every week or so. The only way to get rid of it to make the mouse usable is to delete all my bluetooth prefs and reboot. It usually happens after the mac has gone to sleep a few times. The other irritation where the mouse disconnects every hour or so then reconnects happens more after the unit goes to sleep and wakes as well.

All of this is new since Mavericks, and is at least slightly better in Yosemite (the wifi problem is finally resolved - that was even worse than the Bluetooth mouse problem, though I'm sure it's related). But that's no excuse - it worked fine before and now it's broken, for two major OS releases. There are lots of ideas about why this is broken out on the net, and really Apple should just friggin fix it (go look around if you can't figure it out). I shouldn't have to turn off features like BT PANs, or toggle WiFi settings or disable Handoff, or anything - it should just work. We aren't talking about anything special here, this is a mouse.

Kevin N.

^

The problem has still not returned for me since disabling handoff.

You know it's all Apple's screw up when the same exact hardware performs flawlessly on Microsoft Windows 10 (a preview build, not even final software) in Bootcamp better than it does on Apple's OSX.

Every few minutes this ****** thing disconnects from my Mac. I'm going to delete all my prefs - again.

I wish someone at Apple actually cared about any of this...

I may be premature, but I haven't had a problem in the last few days since the latest OSX update (10.10.4) which maybe have finally fixed this problem.

Well, I doubt the update has resolved the issue as I am running 10.11, El Capitan beta and the issue is still present... "Magic" mouse lag... Craptastic!

My problem has not returned since I disabled handoff last month.

Another vote for handoff. I know its a running joke, but doesn't Apple test these things?

Seriously... though I'm not missing handoff one bit which is a whole other issue.

Turning off Wifi hasn't helped me.

Turning off handoff hasn't helped me.

Running 10.10.4, Mid 2012 Macbook pro. 2.6ghz i7, 8gb ram