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How can I set a Magic Trackpad (or, any other bluetooth device, I guess) into discovery mode, if it has already been paired to another mac?

Anything I find on google just mocks me.

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1  
Will this be when you are near the Mac it is already paired to? –  Nathan Aug 10 '11 at 14:13
    
I guess you three are right: it was distant enough from the already-paired one that I didn't even consider it was connecting to it... I guess I was wrong. –  Lohoris Aug 11 '11 at 12:48

3 Answers 3

up vote 3 down vote accepted

(I took the Magic Trackpad for example, but it applies to Apple Bluetooth keyboard and Magic Mouse as well)

When you start a Magic Trackpad, it announces itself over bluetooth :

  • If a Mac "hear" it and is paired with it, they connect each other and you can't use the Magic Trackpad with another Mac.
  • If no previously paired Mac are near the Magic Trackpad, it will be available to a new pairing.

So, one Magic Trackpad can be paired to multiple computers. When you start it, the first computer to connect to it get it (first arrived, first served).

If you have two Macs next to each other (A & B), your Magic Trackpad paired to A and you want to pair it with B, you have four choices :

  • Unpair your Magic Trackpad from A
  • Disable bluetooth on A (this can be painful if you only have bluetooth input devices for A)
  • Take A or B far (±10 meters) from the other. Stop your Magic Trackpad and start it again near B.
  • Shutdown A

Once done, you can start a new pairing procedure on B.

I hope it answers to your question.


(you can also stop and start again your Magic Trackpad while detecting new bluetooth devices on B and hope B will find it faster than A, but you'll probably need to make that several times before getting it to work)

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Can't you just hold the power button while powering on to force the device into discovery mode? I agree it's better to not have another device paired, but I've been able to temporarily shift things in the past using a keyboard once with an iPad. –  bmike Aug 15 '11 at 20:03
    
I think it still can be "catched" by a paired Mac but I should try to be sure. Will post here if I do so. –  olivier Aug 15 '11 at 20:21

I just did this. You put your trackpad or keyboard into discovery mode by holding the power key until the green light is blinking. The mac mini recognizes the trackpad almost immediately, and then walks you through the process of connecting your keyboard. Keyboard does not need to be in discovery mode, only needs to be powered on.

Took 2 min, very simple. Don't waste any money or space on a USB keyboard!

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I don't think the magic trackpad (or the magic mouse) have a "discovery mode." Just make sure the bluetooth on the Mac it was previously paired to is off, then go about connecting it to the new Mac as normal.

Apple's support page on this

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The devices should enter discovery mode as indicated by flashing of the green LED - you can force it by holding the power button longer when you turn it on - releasing when you see it flashing. +1 great article link –  bmike Aug 15 '11 at 20:01

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