Magic Mouse bluetooth mouse keeps disconnecting

There is a relatively simple test, you can do, to check, if the problem is caused by “outside” interference (even if you haven’t altered anything since upgrading):

1. Disable (remove power from) ALL your access points in the vicinity of your computer.
2. Disable wireless network on your computer (and all other computers in the vicinity).

If this removes the bluetooth problem, you can try the following with your standard setup (enabled access points):

3. Activate your access point again. Keep wireless network on your computer(s) disabled for now.

If the blueetooth problem turns up again, you’ll have to move your access point around (alternatively your computer). It is often important, that an access point is positioned far from the computer (several feets / one meter or more). Remember, that access points can be moved vertically too ;-)

At first do NOT exclude ANY position on grounds of “looks”. You’re testing here. You need to find out, what youre fighting against.

4. Try turning on the wireless network on your computer, if this is needed on your home work desk. Otherwise leave it off.

If this affects the bluetooth connection, or if varying the access point position does not make any significant difference, you can try this:

5. Remove any connected cabling from the computer. I.e. external USB disks, DVD players etc. Any and ALL external units and cables, except monitor (unless you’re using a notebook or a Mac with built-in screen. Then remove all external monitor cabling too).

If this helps, then try to find out, if only one cable (or device) affects your bluetooth mouse. It may be several cables, or in some rare cases, it will even help to switch two devices (i.e. a USB 3 disk from left USB port to right USB port etc.)

The problem can be caused by “open” USB 3 ports (in the vicinity of a wireless access point) and/or cheap (bad) or defective cabling or device housing (i.e. a “plasticky” external USB 3 disk housing).

This will not always solve your problems, but… it is surprising how often an altered position or a new/better cable can affect wireless problems.

Hope, this will help you in the hunt for a solution.

1. Reboot and reset PRAM (CMD+ALT+P+R)

2. Remove /Library/Preferences/com.apple.Bluetooth.plist

3. clear trash bin and reboot

Worked perfect for me and no further issues with my magicMouse

1.Make your wifi connection to 5GHZ

2. Reboot sytem in safe mode. then restart again in normal mode.

1. Start or restart your Mac.
2. Immediately after you hear the startup sound, press and hold the Shift key.
3. Release the Shift key when you see the Apple logo appear on the screen.

it should work...

Strange, I just did the same thing and now it seems to be working. Thanks

I have the same issues all of you described and tried all solution proposals, nothing has worked. It's a confession of failure for apple to sell a bt mouse for ~90 €, that doesn't work with hardware from the same manufacturer for 2.500€ (2015 MacBook Pro)...

I had 2 Magic Mice. One for my iMac and one for my MacBook. I just swapped them and paired them to the other machine I then deleted the old mouse on each system and both worked fine.

So, I suspect that if you delete your bluetooth mouse and then Pair it again the mouse, it might solve the problem. I have seen other threads where they said they suspected corrupt settings for the mouse and this method worked for them. You might want to reboot after deleting the mouse just to make sure none of the old settings were hanging in memory??? Then reboot and add the mouse again.

I work nearly a day now without any issues (after the MagicMouse disconnected for a few seconds ever ~2 min). What i did to "solve" the problem: i changed the recharable eneloop batteries. The set which "caused" the issues where nearly fully charged (bt settings showed ~85% charge). For me incomprehensible...

I have determined that the problem for me is only when on batteries. And this is consistent - including Magic Mouse (3.5 yrs old model) and brand new Magic Mouse 2. The moment I connect my MBP 15" (model mid 2012) to power, no disconnect anymore.
I tried deleting bluetooth preferences (as some advised) and reboot - to no avail.
All this happening with El Capitan (I jumped from Mountain Lion to El Capitan).

My battery level is fine and I've tried all the suggestions with temporary success. My problem is intermittent and then I ran across this article and it shed some light on the potential source of my problem. Unfortunately, with El Capitan on a Macbook Air the instructions on how to launch RSSI strength monitor doesn't match. but you can monitor it periodically by holding down the "option key" when you click the bluetooth icon on the menu bar and then the device. I don't think that is monitoring the signal strength but the value when the device was selected.

I will continue to monitor my problem and see if this is the root cause.

BTW, I did have a different issue with the magic mouse whenever I plugged a USB-ethernet device into the USB port by the power cord. It essentially made the mouse unusable as it was horribly slow. Moving the device to the other USB port resolved the problem immediately.

I'll update this thread as I continue my experimentation.

https://www.macissues.com/2014/05/22/troubleshooting-bluetooth-connections-in-os -x/

bought magic 2 mouse and it misbehaves with MBPR, works fine with imac.

Still having same problem even after clearing

1. all relevant plists

2. switching off the wifi APs but keeping MBPR wifi on; with MBPR wifi off, it works. seems like internal issue.

3. reseted PRAM

4. booted in safe mode

Missing Steve Job's Quality team.;(

You guys are not going to believe this... I put a couple of pieces of paper between the two batteries so they are tight inside the battery compartment. All my problems went away. I think it has something to do with the spring connector on the mouse and the positive terminal on the battery not lining up properly.

This actually worked!!!

The "paper between batteries" solution also worked for me! I think it's a hardware / design issue. My mouse would disconnect / connect after I bumped the mouse on the table. This happens quite often since the mouse is so low. I think the battery than shortly disconnects from the positive terminal.

I put paper between the batteries and also between the batteries and battery cover. This way they are fixed in both vertical and horizontal position.

My findings were exactly like Applentice's. MBP Mid 2012 - any time I am on battery the connection goes to sleep at will, whenever it feels like it. When connected to power I have zero issues. It would be nice if there was a visible setting for bluetooth sleep settings.

How old is the mouse? I had a similar problem and learned that the batteries were losing contact at the + end every now and then. They were just not snug enough in the batter compartment. I placed some Al foil, folded up, between the battery's + end and the mouse's contact point for each battery. That solved it for me.