Fix MX Master Mouse Lag and Freeze Problem

First thought is some bluetooth problem, tried everything related but not working at all. After a few trial and inspection, it seems that the thumb button is stuck in between causing the mouse pointer not able to move smoothly.

Disabling the thumb side button in Logitech Options won’t help. It sounds like a hardware interference not a software driver setting.

This Inkandescent’s post and this operation guide will help fixing it. The pull-up workaround in the previous thread doesn’t work very well, so buying the T5 screw driver and loosing the thumb button board screws is the final solution.

MX Master bluetooth pair problem with Yosemite

Just bought the latest Logitech MX Master mouse, which is quite powerful for Yosemite to natively support Mission Control and Spaces with its mouse gesture button, together with the interesting Smart Shift scrolling feature.

But also encountered the problem of pairing it with my MBP Retina on Yosemite 10.10.3. One discussion thread in the logitech forum suggested to delete all existing bluetooth devices to fix the connection. However, some hidden devices remain in the bluetooth paired list for Alt-Click menu. In this case, a complete bluetooth plist delete will finally help to pair the mouse with MBP.


Update:

Yosemite Bluetooth sometime freezes after wakeup, which then cannot be turned on/off and receive connections until reboot. If you want to manually restart it, do it by command line:

sudo kextunload -b com.apple.iokit.BroadcomBluetoothHostControllerUSBTransport

sudo kextload -b com.apple.iokit.BroadcomBluetoothHostControllerUSBTransport

Or you can use my Bluetooth Restart Alfred Workflow or similar AppleScript.


El Capitan UPDATE:   Above bluetooth kext restart method will make the bluetooth driver unusable in 10.11, so restart your mac seems the only way to fix bluetooth freeze.