Why does the Magic Mouse prevent me from clicking with my trackpad? It often happens to me that I open my MacBook Pro to use it while traveling, only to find out that I can't use it because the effin' Magic is locked away in some luggage, and the trackpad is not clicking. Of course I cannot turn the Bluetooth off, since the trackpad doesn't click. But the weirdest thing is that I always turn the Magic Mouse off before putting it away (I move the slide on the bottom so that the green color is not showing), yet it still prevents me from using the trackpad!

Why does that happen? What's with this brilliant design choice that one couldn't use the trackpad if one also has a Magic Mouse?
This is a feature, not a bug. The idea is that you might want to disable the trackpad if you are using a mouse because, for example, you accidentally hit the trackpad with the palm of your hand.

I thought it was turned off by default, but in any case, here’s how to turn it on or off:



System Preferences » Accessibility » Mouse &amp; Trackpad 

[ ] Ignore built-in trackpad when mouse or wireless trackpad is present 

For more details: OSX Daily: Ignoring Built-in Trackpad Input When Using External Mouse with MacBook

Turning Bluetooth On / Off Without the Mouse

1) If you have brew installed, you can easily install blueutil via brew install blueutil. Then you can disable Bluetooth by going to Terminal and typing:

blueutil --power 0

2) “Full Keyboard Access” can also help:



Once that is enabled, open Bluetooth preferences in System Preferences and press Tab to highlight the “Turn Bluetooth Off” button, as shown here:



Then press the Spacebar to turn Bluetooth Off.

3) If you use Alfred or LaunchBar, I suspect they probably have tools to allow you to toggle bluetooth as well.