Also, the USB driver recognizes the fact that it's plugged in.

Note, after I woke the computer using the attached keyboard and trackpad, about 1 minute later the magic mouse and keyboard connected. After some time of inactivity, many mice models, including dell, turn off automatically (sleep mode) to save battery power. Internal trackpad and keyboard worked fine.

Today after waking my rMBP from sleep, magic mouse and keyboard were not responsive. The thing that's bizarre is that the computer actually does recognize the fact that the mouse is still plugged in when it wakes up because when I checked the option to 'disable the trackpad when external pointing device is connected', the trackpad immediately became disabled, even when the mouse wasn't working due to the computer having just woken up. This problem has not gone away with the release of Yosemite. I also made sure that the setting for 'allow pointing device to wake computer' was enabled and it was. Went to Control Panel - Edit Power Plan -> Advanced -> USB -> Disabled 'selective suspend' for USB ports. Now, Macs made since 2013 have a standby mode after being asleep for 1 to 3 hours.

Typed in my password and Voil, was at the desktop. The latter is a pain because the USB already fits kind of snug and it creates unnecessary wear on the port. Put the MacBook to sleep two different ways: Closing the lid and selecting Sleep from the Apple Menu. For whatever reason, when my laptop goes to sleep and then I wake it back up, my external USB mouse no longer works and the only way for me to navigate is either to use the trackpad OR unplug the mouse and plug it back in. I recently bought a new Windows 10 box which is a laptop.

Mouse not working after sleep