lagging cursor from magic mouse and magic trackpad I have a brand new mac mini 2012 connected to a Thunderbolt display. Since the Thunderbolt display was connected, I sometimes get a lagging cursor, meaning that moving the mouse/trackpad leads the cursor to follow the position very slowly. I have connected both, a Magic Mouse and a Magic Trackpad. 

I'm trying to track down this issue but up to now, no avail. I've already connected another Magic Mouse, but same here.

Any idea welcome.

EDIT: if only the trackpad or the mouse is attached, it gets a bit better, but still not acceptable. I also moved around my WiFi-station and the Mac mini - not better.
Thanks for the hint with the radio interference, that seemed to be a large part of the problem.

In the end I did a lots of thing to get it going (consider it took like 6 hours all in all):


I switched to cable network in that room (almost). WiFi and Bluetooth definitely where interacting negatively. BTW: cable networking feels so much better!
the WiFi base-station was moved away from the Mac mini to the opposite side of the room.
the Magic Trackpad is switched off most of the time. It looks like there is some kind of interference between Magic Mouse and Magic Trackpad.
I deinstalled or updated any system preferences app, especially everything that has to do with GUI control.


Why I didn't move to a cable-mouse? I'm used to work with the swipe gesture a lot, and I'm not aware of a cable-mouse that understands Mac gestures.