Sometimes the device takes a second attempt to locate the keyboard, but it does indeed work. I just tested it using my Mac and my iPhone 4 and it works perfectly. To use the keyboard on the iPad, make sure the device has bluetooth enabled and that your Mac has that service disabled (you should disable the service before trying to connect the keyboard to the other device). While no official Apple solution exists, there are free third-party apps on the App Store that you can use instead.
Follow this answer to receive notifications. You can use your iPhone or iPad as a wireless keyboard or mouse with free software available on the App Store.
Air Keyboard gives you a unique opportunity to use your iPad, iPhone and OS Android devices as a wireless keyboard for your computer.
It shares keyboard and mouse on one system with one or more systems using software. It lets you use your iPad as a wireless keyboard. Turning it on again will get the iPad to pick it up and a prompt will ask you to enter a 4-digit sequence of numbers and the "ENTER" key. I have never used it, but you can give Synergy a try. Turn your keyboard off (hold the power button till the light glows and then dims). Connect a USB mouse With the appropriate cable or adapters, you can connect various third-party mouse devices with iPad using USB and USB-based receivers. Next, head over to your iPad and enable bluetooth. To reconnect, turn the mouse switch to On, or bring the mouse and iPad back into range, then click the mouse.
Once the keyboard is paired, uncheck "discoverable" (which should remain off unless you wish to pair another device) and then turn off Bluetooth.
Then turn on your keyboard and follow the steps to pair it using the Keyboard System Preference pane. Just press the button on the downside of the mouse for 1 second: Blue light is to use. And enable it on your Mac (make sure the box that says "discoverable" is checked). The keyboard and mouse both feature a battery-saving sleep mode. Problems pairing your Apple Wireless a Bluetooth Keyboard Here is the one trick that few people know that sorts it out and gets you working again in seconds. First, make sure Bluetooth is turned off on your iPad. It may say Bluetooth, printers, mouse underneath it.