How to Connect a MIDI Keyboard to a Mac Book Pro

Insert the MIDI cable into the 'MIDI OUT' jack on your keyboard. Check your keyboard's user guide for the exact location of the jack. The MIDI cable should have five prongs that match up with holes inside the output jack. Guide these prongs into their matching holes. Wiggle the cable after inserting it to make sure it sits securely.
Insert the other end of the cable into the 'MIDI IN' jack on the MIDI interface device. Check the interface's user manual for the exact location of the MIDI input jack. The jack will have 5 holes to match up with the 5 prongs on the MIDI cable.
Connect the MIDI interface to the Mac Book Pro with a MIDI to USB cable. Insert the MIDI end of the cable into the 'MIDI Out' jack on the interface. Insert the other end into an open USB slot on your laptop.
Turn on the MIDI keyboard and Mac Book Pro. Plug the MIDI keyboard's power cord into an electrical outlet. Press and hold the circular button to the right of the Mac Book Pro's keyboard. Wait for the laptop to power up.
Open the Garageband music application and wait for the program to recognize the keyboard. Open the Garageband application on your computer and let it start up completely. A window will appear stating you have a new MIDI device available for use.
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How to Remove the Casing From a Mac (9 Steps)

Locate the lever. On the Mac Pro, there is a lever that needs to be positioned correctly in order to remove the case. The lever is rectangular in shape, positioned vertically, and sits flush with the face of the back panel.
Flip the lever. Apply pressure on the top portion of the lever with your thumb. This will cause the bottom portion of the lever to pop outward from the case. Pull out on the bottom portion until you feel a light snap. This is a sign that the locking mechanism has been released. The lever should stay in the outward position that it is currently in.
Fold down the side panel. The removable side panel is located on the same side of the Mac Pro as the lever. You may have to lift the panel up slightly and pull outward to release it from the rest of the case. The side panel should now be completely free and positioned where you can easily lift it away from the rest of the case.
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How to Upgrade Your MacBook Air

Remove screws. The internals of a MacBook Pro are accessed form the underside of the casing. The bottom is held in place by ten screws, including six 3 mm Phillips screws, two 5.4 mm Phillips screws, and two 7.9 mm Phillips screws.
Lift off the case. Once the screws are removed, the bottom of the MacBook Air case should come off easily, with a quick pull.
Disconnect the accessory ports. Your MacBook Air's current hard drive or solid state drive sits underneath the ribbon that connects your accessory USB, audio, power and DVI connectors. With the bottom of the case removed, unplug the ribbon that connects these accessories to the motherboard.
Remove hard drive screws. Once the accessory ports are disconnected form the board, remove the screws that hold the hard drive frame in place.
Lift the hard drive frame. Make sure that the ribbon that attaches the accessory ports is safely out of the way. If the path is clear, the hard drive and its frame can be lifted from the computer.
Replace hard drive. With the frame and hard drive out of the computer, the current drive can be slid out of the frame and a new one inserted. Original generation MacBook Air models use a zero insertion force (ZIF) connector, so make sure the hard drive or solid state drive you use has this type of connector. Models manufactured after the summer of 2009 feature a more common Serial ATA (SATA) connector. All MacBook Air hard drives or solid state drives must be 1.8 inches wide by 5 mm tall to fit in the frame.
Reassemble MacBook Air. Place the bracket back in the computer and secure it using using the removed screws. Reattach the ribbon connectors for the accessory ports. Replace the back of the computer and secure it with its 10 screws. Boot the computer and install Mac OS X, being sure to test functionality.
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