The magic mouse 1 (with batteries) does not really work well with iPad. You need the magic mouse 2 (rechargeable). In that case you can pair it under bluetooth settings on iPad (I think you would have to unpair from iMac first, if it's within range).
The magic mouse 1 (with batteries) does not really work well with iPad. You need the magic mouse 2 (rechargeable). In that case you can pair it under bluetooth settings on iPad (I think you would have to unpair from iMac first, if it's within range).