Q: Bluetooth mouse won't connect after wake from sleep

@FlyingPiggie were you able to resolve this issue? I am having the same exact problem with the same MX Anywhere 2 mouse.

I'm having identical problems with a Logitech Anywhere MX2. On 2015 iMac it can wake the system and stay connected. On 2013 Macbook Air it is disconnected every time the laptop sleeps (and has to be repaired to work again). Magic Keyboard connected to the same Macbook Air does not have any issues at all. Both systems are 10.11.1, recently reinstalled.

After trying various combos of BT devices and macs, I'm reasonably sure the older BT controller in the macbook air is broken, whether by design, obsolescence, or failure. Guess I'll have to use Logitech's USB dongle, defeating the entire purpose of buying a BT mouse.

You can try adding a BT adapter and pairing your mouse to that. Just make sure you get an adapter with a compatible Mac chipset and use BlueTooth explorer to toggle between the two.

Why would I purchase a bluetooth device using an international standard which is supported by my computer, and then get a third-party adapter to use it? I might as well have gotten a proprietary wireless mouse. The reason for using this forum is to figure out why an APPLE product (Mac or OSX) is malfunctioning, not to jury-rig it with another component.

This problem is now also affecting my iMac. Logitech Anywhere MX2 is not recognized after waking from sleep unless OSX's bluetooth is toggled off and back on. Magic Keyboard works fine.

I've almost exactly the same setup and problem.

Macbook pro 15 late 2014 (EL Captain)+ Logitech K810 + MX Master

Macbook air 13 early 2014 (Yosemite) + Logitech K811 + MX Anywhere 2

In both cases the keyboards work flawlessly, not the mouse.  1 out of 10 times the 15 mbp would lost connection with the MX master, while the 13 mba lost it every time waking from sleep. Both could be fixed with a reboot, or turning off bluetooth then on, or re-pairing.

Haven't heard any PC users (via bluetooth) complaining the same issue. Who is to blame, apple or logitech?

Just called logitech supporting engineers, they have no clue at all.

Did you expect it?   It is an Apple machine, not a PC.    And the new Magic Mouse is meant to work with 10.11.2  El Capitan.   If you use foreign accessories you must expect such happenings when a new system is introduced.

Lay off the koolaid, 71. That doesn't help anyone on this thread solve their problem.

If Apple doesn't want to support a standard like Bluetooth then they shouldn't advertise as supporting it. Your case for the magic mouse would have some merit if it used a proprietary Apple protocol, which it doesn't.

Please check http://www.logitech.com/en-ca/articles/mx-master-immersion-guide

Both the MX master and mx anywhere are mac compatible (osx 10.10 and 10.11).

Their products should work as they claimed, period.

I just got this mouse and ran into the same issue. After sleep, it simply stops working. I need to re-pair the entire device. I know it is not a bluetooth issue because I am using a bluetooth keyboard without issue. It's a $65 mouse... what the heck!

Any bluetooth mouse should work, or is not a bluetooth mouse...

After the 10,11.3 upgrade things got better. It always take a moment or two to restar the mouse, and sometimes it never come back - only restarting the Mac.

Funny is I got a MS bluetooth mouse and keyboard that I used to use with a Mac Mini with Lion. Both worked for years, never got this kind of issue, works even to boot with option pressed or whatever boot function needed.

I risk myself to say that bluetooth will never works 100% in El Capitan, it seams a deep system issue, and they will not work so deep, ain't Jobs in the team anymore... there is no "just works" in Apple products anymore...

I found this thread searching for similar issues with my Logitech MX Anywhere 2 on a Dell Laptop with Windows 10, I suspect this is a Logi issue, not Apple.

I had same problem. Everytime I woke mac i had to pair mouse again.

SOLUTION - uncheck all 3 advanced bluetooth settings (http://support.logitech.com/en_us/article/Bluetooth-device-doesn-t-work-after-co mputer-wakes-from-sleep-mode?product=a0q…) save and close system preferences. open bluetooth preferences up and check everything again.

TEST - put mac to sleep. MUST WAKE MAC with mouse. Click mouse buttons and wait till mac wakes - and you will be good.